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Software Construction: Building a Process Model: Often one of the first steps taken in unit troubleshooting, optimization, or debottlenecking, a complex system is the development of a computer model of the process. Increasingly, process safety management, operator training, engineering training, and environmental regulatory requirements are also aided by computer simulation. These electronic models provide powerful tools for equipment and system analysis. From individual pieces of equipment to groups of several facilities, process models allow rigorous analysis of current performance, performance prediction under alternative operating conditions, and optimization.

Avoid Sulfolane Regeneration Problems: The regeneration of sulfolane, a common extraction solvent, is difficult. With proper attention to design and operation, problems can be minimized.

Caution is not Safety: Preventing dangerous actions is something we equate with being safe. Yet taking proper action is a more important aspect of safety.This case study reviews a catalyst change at a Selective Hydrotreater Unit and examines how seemingly cautious choices can increase risk.

Debottlenecking Options and Optimization: Increasing production from facilities to accommodate product needs can be accomplished by building new units or by debottlenecking existing capacity. Even when new plant construction is the ultimate answer, debottlenecking of existing facilities is usually examined as an option, or implemented in some fashion to supplement new facilities. Often an existing plant can be modified more quickly than a grass roots unit can be started up. In the time required to fund, permit, design, build, and startup a new plant, the undulations of Figure 1 may render the project unprofitable. Existing facility debottlenecking is an attractive method for increasing production with a minimum of risk.

Deep Cut Vacuum Tower Incentives for Various Crude's: Deep Cut vacuum tower conditions can offer significant benefits over traditional operations.- Detailing the prospective Deep Cut product slate, costs, and payout requires an engineering study. However, initial project feasibility reviews can benefit from simplified analysis. This paper compares Deep Cut incentives for typical light and heavy crudes, Brent and Arabian Heavy. The resultant yields and payouts are compared.

Heat Integration Complicates Heat Pump Troubleshooting: A naphtha fractionator unit had operated well for years but began to experience warm weather trips of the heat pump compressor. During the summer the compressor would shut down on high discharge temperature for no apparent reason.

Select the Right Hydrocarbon Molecular Weight Correlation: This paper examines molecular weight distribution predictions of ten different correlations for two different crude oils. The effects of these results are illustrated by examining simulation data for a typical crude and vacuum distillation unit for one of the crudes under study using molecular weight correlations which span the continuum of the predictions. Emphasis is placed on simulation process parameters which vary with molecular weight and their significance in operation, simulation, and design.

Plant Power Failures: At 10:30 AM a total power failure struck a world scale olefins manufacturing plant. After the hard shutdown caused by the thirty minute power outage, the facility was restarted. This event precipitated health, safety, and environmental incidents which dominated the facility's operation for the following four days. The lingering effects of the power failure were felt for months. This paper describes the indirect effects of a power failure at an olefins manufacturing facility. What things, often unanticipated, can occur in addition to the loss of electrical appliances when power vanishes?

Process Hydraulics Considerations: A fluid moving through pipe or equipment is a well understood phenomena. However, having a firmly rooted understanding of fluid mechanics does not fully describe the affects on system function and design. Where hydraulic calculations meet process requirements can be thought of as Process Hydraulics. Real-world Hydrocarbon Processing Industry examples are reviewed as examples of potential pitfalls. Included areas are: Unusual Operating Conditions, Two-Phase Fluids, Condensing Fluids, Hot Vapor Bypasses, and Piping and Plot Plan.

Process Simulation: Matching the Computer's Perception to Reality: Often one of the first steps taken in unit troubleshooting, optimization, or debottlenecking, is the development of a computer model of the process. An accurate existing facilities model is a powerful tool allowing rigorous unit operations analysis, 'What if?' investigation, and multiple scenario generation. Building a robust model is in itself a project that should be approached in an organized fashion.

Programming is not Just for Programmers Anymore: In the early days, less than 10 years ago but several generations in the computer business, writing a program on your desktop computer to take care of the odd engineering calculation was tedious, but not difficult. Most major Universities assured through many curriculum's that you at least had the opportunity to learn the skills necessary to write simple code. Operating system vendors made it easy by including with every system a version of the BASIC language and a line-editor to create the code. Today, things are different.

Steady State Simulators for your Project: Many choices are available when selecting a simulator for your project. Base your decision on a combination of factors. The availability of an in-house or software package already licensed by your firm is compelling, but if your project requires capabilities outside the scope of this program, the cost of a short-term lease for a simulator that is more applicable might be small compared to an inadequate design.

Column Heat Input Limit Reveals Design & Operating Issues: As refiners work to increase unit production or accommodate feed composition changes with minimal capital investment, existing equipment design and operating conditions should be evaluated for opportunities. In many cases throughput limitations can be resolved through review and modification of existing equipment design.

Debottlenecking Economics - Maximizing Profitability with Minimum Capital: As utilization rates continue to be high, extracting increased unit capacity continues to be profitable. Debottlenecking can provide a cost effective means for upgrading capacity. Beginning with unit design, thorough unit review and proper planning are the two most powerful tools available to achieve existing plant debottlenecking. With the definition of available options and their profitability, a course of action can be discussed. Ultimately, debottlenecking may or may not be selected as the proper course of action. However, the information collected during a debottlenecking study will almost certainly identify improvement opportunities that were unknown, and that may cost very little.

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Last Updated October 12, 2017 by TLF   Increase your website traffic with
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