Plant Safety is strongly dependent on how well people responsible for running the facility (control room operators, CRO) is aware of its operation. Producing plants must be safe and reliable. Proceedings of the 27th Symposium on Computer Aided Process Engineering – ESCAPE 27 Manel Serra, Erika Franco, Lluís Rumi, JoséMaria Ferrer, José María Nougués (Inprocess)Ģ017. Once the formation of dry ice was confirmed by the different dynamic analysis, several mitigation techniques were planned and tested with additional dynamic simulation runs that helped to diminish the dry-ice appearance and its impact on plant performance.
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The dynamic analysis performed with the simulator allowed to determine the amount of dry ice formed, the time when the CO2 started to appear, and the time when CO2 melted back and disappeared. VMGSim, from Virtual Materials Group (VMG), was the dynamic process simulator of choice due to the availability of the APR-SolidCO2 property package, which allowed for the quantitative determination of the dry-ice formation. Several simulation studies have been carried out to determine if in current process conditions the depressurization of the process sections could lead to the formation of dry ice. The formation of dry ice during depressurization constitutes a threat to the safety integrity of the system.
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Hazard analysis did identify the potentiality for solid CO2 (dry ice) formation during depressurization (blowdown) in, basically, any section of the different process units. Many blowdown valves are installed along the compression systems, the associated pipelines and equipment. Several compression systems boost the pressure of the permeate stream (2.5 bara) to a pressure in the range of 450–550 bara, pressure level suitable for reinjection. For environmental reasons, the CO2-rich permeate stream from the gas treatment process must be re-injected into the reservoir. The associated gas of an oil-producing field in off-shore Brazil is treated to remove water, hydrocarbon condensate, H2S and CO2. Cutting-Edge Technology for Carbon Capture, Utilization and Storage (CETCCUS), Pages: 135 - 146 Josep-Anton Feliu and Miquel Àngel Alós (Inprocess) and Michele Manzulli (Virtual Materials Group Europe)Ģ018. This document presents the implementation of a cryogenic distillation column in Aspen HYSYS by setting the thermodynamic principles upon which the simulation is founded and verifying isotopic separation models with experimental data available in the literature. The present work proposes the use of a commercial dynamic process simulator such as Aspen HYSYS given its abilities to overcome the challenges described. Dynamic simulation tools are key in the analysis and design of tritium processing systems and the use of commercial simulators can be especially valuable to this end and may add capabilities in terms of standardization of industrial-scale fusion plant modeling and conjunction of operator training systems, human-machine interface and process monitoring and control. The design of the ITER’s Isotope Separation System can still undergo major changes due to its close contact with the Water Detritiation System and this will be decisive in the design of future DEMO detritiation facilities. 169, August, Pages: (online)Ĭryogenic distillation is the best candidate for hydrogen isotopic separation in fusion power plants. The amount of purge gas required depends on the released gas and on the gas purge composition, as well as the size and design of the flare.Įduardo Iraola, José María Nougués, Luis Sedano, Josep Anton Feliu, Lluís BatetĢ021. The most common method for the prevention of air infiltration through the stack exit is to introduce purge gas. Infiltration of air can lead to flame burn back, which in turn could initiate a destruction detonation in the system. The risk associated with this contraction is the depression of the header below atmospheric pressure, allowing outside air to enter into the flare system. The rate of contraction velocity is accelerated if cooling leads to condensation of the contained gas components. During a relief of hot gases, contraction of the gases could occur due to the cool-down to ambient conditions.
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October, Pages: 81 – 84ĭuring a flare release, the temperature of the flare network has a strong dependence on the relief source and on ambient conditions. Miguel-Ángel Navarro and Miquel-Àngel Alós (Inprocess)Ģ020.