Flare minimization for an olefin plant shutdown via plant-wide dynamic simulation

Xu, Yiling; Dinh, Ha; Xu, Qiang; Eljack, Fadwa; El‐Halwagi, Mahmoud M.

doi:10.1016/j.jclepro.2020.120129

Cited by 12 publications

(2 citation statements)

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“…However, while the steady-state defines the baseline operation, [95] in real life a plant alternates between steady-state and unsteady state (start-up, shut-down, feed composition variations, for example). [96][97][98] For this reason, we recommend understanding the dynamics of all the operations in the simulation before integrating energy.…”

Section: Energy Integration Intensificationmentioning

confidence: 99%

Experimental methods in chemical engineering: Process simulation

et al. 2020

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Process simulation software designs equipment, simulates operations, optimizes a plant's configuration (heat exchangers network, for example), estimates operating and capital expenses, and serves as an educational tool. However, mastering the theoretical background minimizes common mistakes such as applying an incorrect thermodynamic method, selecting improper algorithms in the case of tear systems, and setting irrational system specifications. Engineers and researchers will exploit this tool more often in the future as constant advancements in simulation science as well as new models are released continually. Process simulators make it easier to build digital twins and thus will facilitate the implementation of the industry 4.0 guidelines. We highlight the mathematical and technical features of process simulators, as well as the capabilities and the fields of application. A bibliometric map of keywords from articles citing Aspen+, Aspen plus, Hysys, and Pro/II indexed by Web of Science between 2017 and 2020 identified the main research clusters, such as design, optimization, energy or exergy, biomass; H 2 and CO 2 capture, thermodynamics; and separations and techno-economic analysis.

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Section: Energy Integration Intensificationmentioning

confidence: 99%

Experimental methods in chemical engineering: Process simulation

et al. 2020

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“…The gas flaring system is an example of this severe condition. The gas flaring system’s primary purpose is pressure relief [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. Flares are considered as the last defense line in plants that produce flammable products.…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of a Flare Tip Used in Offshore Production Platform in Qatar

Mahdi

Esmaeili

2020

Materials

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An immature failure of a gas flare tip used in Qatar oil and gas offshore industry was investigated throughout this study. The design lifetime of the flare was fifteen years; however, it manifested immature failure resulting in a reduction of its lifetime to ten years. The flare is composed of different parts where the upper flare body and wind deflector showed failure while other components were still healthy. The material used for the aforementioned failed parts was Incoloy 800H, which is a highly corrosion and high-temperature resistant steel alloy. The material was rolled up and welded together with different welding joints. The root cause of failure was identified by using chemical analysis and microstructural and mechanical characterizations. For the mechanical characterization, an optical microscope (OM) and scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS) analyses were used for the specimen extracted from the failed part in order to ensure that the material mentioned by the manufacturer demonstrated the same metallurgical properties. For the mechanical characterization, two sets of specimens were used, one close to the failure region and the other far from the failure area. The chemical analysis revealed that the material was truthfully Incoloy 800H. The mechanical examination results showed a significant reduction of mechanical properties, i.e., the ultimate tensile strength (UTS) and microhardness dropped by 44% and 41% for samples close and far from the failure regions, respectively. Careful examination of the failed parts indicated that failure mostly took place in the vicinity of the welds, in particular near the joints. Improper joint designs, as well as a number of joints being designed in tiny areas, worsened the harmful effect of the heat-affected zone (HAZ), resulting in crack nucleation in the HAZ regions. The effect of welding in a combination of harsh service conditions of flare caused further crack extension where they merged, resulting in final immature failure.

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