Case studies refinery

Case Study Refinery and Town 2-2 Input to Phast. ... 

Cansolv , 2009. Cansolv SO2 scruhhing system for sulfuric acid plants, case study refinery acid plant tail gas treatment. Retrieved from http //www.cansolv.com/rtecontent/docu ment/CaseStudy.AcidPlantTailGas.pdf (accessed 05.10.12). 

Load sharing or selective load shedding is of interest to many users of hot gas expanders. A particularly successful European FCC application is illustrated in Figure 6-43. The addition of an expander-generator set to the FCC unit at a major refinery presented a challenge because a trip of the expander could upset the process. The company that is the subject of this application case study, GHH Borsig, solved this problem with the installation of a computerized control system and through computer simulation of trips. 

Generally speaking, typical major incident conditions correspond to a release of some ten thousands of kilograms of some hydrocarbon at the site of a chemical plant or refinery that is characterized by the presence of obstructed and partially confined areas in the form of densely spaced equipment. The relative agreement with results derived from the multienergy method indicates that application of this concept is a reasonable approach for this case study. 

Case study 4 is based on the updating of information displays for refinery furnace control from traditional pneumatic panels to modem VDU-based display systems. In addition to illustrating the need for worker participation in the introduction of new technology, the case study also shows how task... 

To illustrate how this framework can be realized in the design of computer-based displays, a case study is presented which was conducted for a refinery. 

Karimi, I. A. Refinery Scheduling. CACHE Process Design Case Studies, I. Grossmann and M. Morari, eds., CACHE Corporation, Austin, TX (1992). 

METHODOLOGY AND APPROACH TO ENVIRONMENTAL SITE INVESTIGATIONS OE LARGE INDUSTRIAL SITES IN ORDER TO OBTAIN OPTIMAL COST/BENEFIT RATIOS CASE STUDY OF THE ISAB - ERG PETROLI REFINERY AT PRIOLO GARGALLO (SR), ITALY... 

In the next sections, we will present a series of empirical model based case studies that illustrate different planning techniques commonly used in practice by many refineries. 

The purpose of this case study is to illustrate how to develop such models. Since the FCC process is the most important and widely used process in a petroleum refinery, the present work is concerned with predicting yields and properties for this process. 

The remainder of Chapter 5 is organized as follows. In Section 5.2, we explain the problem statement of the petroleum refinery and petrochemical integration. Then, we discuss the proposed model formulation in Section 5.3. In Section 5.4, we illustrate the performance of the model through an industrial-scale case study. The chapter ends with some concluding remarks in Section 5.5. 

In this section we demonstrate the performance of the proposed model on an industrial-scale case study. Instead of considering the full scale petrochemical network which may have limited application, we consider a special case of the integration problem. Although the proposed formulation covers the full scale refinery network and petrochemical systems, the case study will consider the integration of a petrochemical complex for the production of polyvinyl chloride (PVC) with a multi-refinery network. PVC is one of the major ethylene derivatives that has many important applications and uses, including pipe fittings, automobile bumpers, toys, bottles and many others (Rudd et al., 1981). 

However, the increase in the sample size N will depend on computational time and available computer memory. In our particular case studies, we run into memory limitations when we increase the sample size N beyond 2000 samples. Table 7.3 shows the solution of the single refinery problem using the SAA scheme with N = 2000 and N = 20000. The proposed approach required 553 CPU s to converge to the optimal solution. 

In this example, we extend the scale of the case study to cover strategic planning for three complex refineries by which we demonstrate the performance of our model to... 

The problem was solved for different sample sizes N and N to illustrate the variation of optimality gap confidence intervals, while fixing the number of replications I to 30. The replication number R need not be very large to get an insight into Vn variability. Table 9.3 shows different confidence interval values of the optimality gap when the sample size of N assumes values of 1000, 2000, and 3000 while varying N from 5000, 10 000, to 20 000 samples. The sample sizes N and N were limited to these values due to increasing computational effort. In our case study, we ran into memory limitations when N and N values exceeded 3000 and 20 000, respectively. The solution of the three refineries network and the PVC complex using the SAA scheme with N = 3000 and N = 20000 required 1114 CPU s to converge to the optimal solution. 

Lorton, G.A. Fromm, C.H. and Meltzer, M.P. 1988 (draft). Waste Minimization Assessment Report Case Study of Minimization of Stretford Solution Purge at an Oil Refinery. Jacobs Engineering Group, Inc Prepared for EPA Hazardous Waste Engineering Research Laboratory, Office of Research and Development, Cincinnati, OH. 

The TRE study was conducted (between 1998 and 2000) for metal refinery that was intermittently non-compliant with toxicity limits (> 50% mortality in 100% final effluent) for Daphnia magna and rainbow trout. Although not classified as a small-scale test, the results from the rainbow trout tests were also included in this case study. Key elements of the study included Phase I TIEs, Source Investigations and Toxicity Treatability Evaluations. The study team included site operations and process representative, toxicologists, chemists and engineers. 

Case Studies. As shown in Figure 2, metals passivation is utilized effectively with 4Ni+V concentrations less than 6000 ppm. Specific benefits of antimony metals passivation for two refinery FCC units operating at less than 6000 ppm 4Ni+V are discussed below. 

Case Study Problem Economic Evaluation The estimated 2001 construction costs of the refinery process units and their utility requirements are listed in Table 8.39. 

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