Mejora de la recuperación de Líquidos de Gas Natural (NGL) en el sistema de drenaje frío cerrado
Fecha
2018
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Universidad Antonio Ruiz de Montoya
Resumen
En la presente tesis se ha evaluado la situación actual del sistema Drenaje Frío
cerrado (DFC) de la planta de fraccionamiento de líquidos de gas natural (PFLGN), en donde
los líquidos de gas natural (NGL)1 son la materia prima. Después, mediante la simulación de
sistemas con el software Stella 9.0.2, el objetivo es dar propuestas de mejora con el fin de
aumentar la recuperación de NGL en el sistema DFC.
El sistema DFC se encuentra conformado por cuatro subsistemas: (a) subsistema de
colección, (b) subsistema de acumulación y separación, (c) subsistema de recuperación y (d)
subsistema de combustión. Además, está conectado a diferentes equipos de la PFLGN,
siendo los principales alimentadores del sistema: (a) Filtrado pre almacenamiento (Filtros
Peco), (b) Filtrado post almacenamiento (Filtros Nowata) y (c) la línea de ecualización.
El NGL ingresa al sistema por el subsistema de colección a través de la apertura de
una válvula del equipo a drenar, luego se transporta por diferencia de presiones al subsistema
de acumulación y separación en donde el NGL es separado en hidrocarburos líquidos y gases.
A continuación, el subsistema de recuperación recupera los líquidos y el subsistema Ground
Flare quema los gases. La quema de estos últimos produce un bajo porcentaje de
recuperación de NGL.
El sistema DFC trabaja las 24 horas del día los 365 días del año. Se han simulado
365 réplicas de un día de duración cada una. Se han realizado dos modelos del sistema, uno
para el sistema actual el cual informará cuánto NGL se recupera actualmente, y otro con el
sistema mejorado, que informará cuánto NGL adicional se recuperaría.
Para aumentar la recuperación de NGL en el modelo mejorado se ha propuesto inyectar
al proceso el 85% de NGL de los filtros Peco y Nowata antes de drenar, y en el caso de la
línea de ecualización, proponemos calentar el líquido con la inyección de una corriente de
gas propano caliente evitando así el drenado en un 100%. Finalmente, mediante un análisis comparativo de los resultados de la simulación de ambos sistemas se
estima que el sistema mejorado recuperaría 2,419.7 +/- 4.7% barriles adicionales de NGL al
año que se elimina actualmente, y la emisión de gases de efecto invernadero disminuiría en
702.61 toneladas anuales.
This thesis evaluates the current situation of the Cold Closed Drainage System (DFC) of the Natural Gas Liquids Fractionation Plant (PFLGN), in which Natural Gas Liquids (NGL) are the raw material. The objective of this thesis is to give proposals for improvement to increase the recovery of NGL in the DFC system; to evaluate the current situation and finally to perform the simulation of systems by software Stella 9.0.2. The DFC system is made up of four subsystems: (a) collection subsystem, (b) accumulation and separation subsystem, (c) recovery subsystem and (d) combustion subsystem. The DFC is connected to different equipment of the PFLGN. (a) Pre-storage filtering (Peco Filters), (b) Post storage filtering (Nowata Filters) and (c) the equalization line are the main feeders of the system. The NGL enters the system, through the collection subsystem by opening a valve of the equipment to be drained, then it is transported by pressure difference to the accumulation and separation subsystem where the NGL is separated into liquid hydrocarbons and gases. Then the recovery subsystem retrieves the liquids and the Ground Flare subsystem burns the gases. The burning of these latter produces a low percentage of NGL recovery. The DFC system works 24 hours per day and 365 days per year. The study simulated 365 replicas of one day each and created two models of the system. One of them will report us how much NGL is being recovered by current system, and the other one will inform us how much additional NGL would be recovered by the improved system. To increase the recovery of NGL in the improved model, we propose to inject 85% NGL from the Peco and Nowata filters before draining, and in the case of the equalization line, we propose to heat the liquid with the injection of a current of hot propane gas thus avoiding drainage by 100%. Finally, through a comparative analysis of the results of the simulation of both systems, it is estimated that the improved system would recover 2, 419.7+/- 4.7% barrels per year of the NGL which is currently removed, and the emission of greenhouse gases would decrease by 702.61 tons per year.
This thesis evaluates the current situation of the Cold Closed Drainage System (DFC) of the Natural Gas Liquids Fractionation Plant (PFLGN), in which Natural Gas Liquids (NGL) are the raw material. The objective of this thesis is to give proposals for improvement to increase the recovery of NGL in the DFC system; to evaluate the current situation and finally to perform the simulation of systems by software Stella 9.0.2. The DFC system is made up of four subsystems: (a) collection subsystem, (b) accumulation and separation subsystem, (c) recovery subsystem and (d) combustion subsystem. The DFC is connected to different equipment of the PFLGN. (a) Pre-storage filtering (Peco Filters), (b) Post storage filtering (Nowata Filters) and (c) the equalization line are the main feeders of the system. The NGL enters the system, through the collection subsystem by opening a valve of the equipment to be drained, then it is transported by pressure difference to the accumulation and separation subsystem where the NGL is separated into liquid hydrocarbons and gases. Then the recovery subsystem retrieves the liquids and the Ground Flare subsystem burns the gases. The burning of these latter produces a low percentage of NGL recovery. The DFC system works 24 hours per day and 365 days per year. The study simulated 365 replicas of one day each and created two models of the system. One of them will report us how much NGL is being recovered by current system, and the other one will inform us how much additional NGL would be recovered by the improved system. To increase the recovery of NGL in the improved model, we propose to inject 85% NGL from the Peco and Nowata filters before draining, and in the case of the equalization line, we propose to heat the liquid with the injection of a current of hot propane gas thus avoiding drainage by 100%. Finally, through a comparative analysis of the results of the simulation of both systems, it is estimated that the improved system would recover 2, 419.7+/- 4.7% barrels per year of the NGL which is currently removed, and the emission of greenhouse gases would decrease by 702.61 tons per year.
Descripción
Palabras clave
Gas natural, Sistema de drenaje, Drenaje, Perú, Ingeniería industrial, Ingeniería
Citación
Rodríguez, E. (2018). Mejora de la recuperación de Líquidos de Gas Natural (NGL) en el sistema de drenaje frío cerrado [Tesis de pregrado, Universidad Antonio Ruiz de Montoya]. Repositorio Institucional UARM. http://hdl.handle.net/20.500.12833/1915