Propuesta del sistema de tratamiento de gases de combustión de la ETE “Carlos Manuel de Céspedes “ para la planta de cultivo intensivo de macroalgas marinas
Fecha
2018
Autores
Mesa Mirabal, Mario Sergio
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Editor
Universidad Central ‘‘Marta Abreu’’ de Las Villas. Facultad de Química Farmacia. Departamento de Ingeniería Química
Resumen
En el siglo actual se han intensificado los proyectos de investigación encaminados al desarrollo de una tecnología viable que permita obtener biomasa algal a partir de macroalgas. El presente trabajo persigue realizar un estudio para proponer un sistema adecuado para el tratamiento de los gases de combustión de la Empresa Termoeléctrica (ETE) “Carlos Manuel de Céspedes” que permita su empleo como nutriente en el cultivo intensivo de macroalgas marinas. Se evaluó el esquema de tratamiento para 120 m3/h de gases de combustión empleando el software Aspen HYSYS, lo que permitió seleccionar una alternativa adecuada según las características específicas del proceso, la cual consiste en el empleo de una columna de burbujeo empleando agua para la remoción del material particulado presente en los gases de combustión de la ETE debido a que las concentraciones de SOx y NOx se encuentran en el rango de asimilación de la Ulva Lactuca. Las dimensiones principales de la torre se determinaron con el empleo del software, resultando el diámetro de 0,6m, la altura de 4,2m y el tiempo de residencia del líquido de 300s. Se incluyó la propuesta de un sistema de control automático considerando un pH de 6,8 como parámetro de control fundamental del cultivo de la Ulva Lactuca. El análisis técnico económico de la inversión propuesta indicó que es viable efectuar el proyecto con VAN de $862607,82, una TIR del 36% y un periodo de recuperación de 3,3 años aproximadamente. La repercusión ambiental implica una disminución de unas 849 t/año de emisiones de CO2 en la atmósfera.
In the current century, research projects aimed at developing a viable technology for obtaining algal biomass from seaweeds have intensified. The present work aims to carry out a study to propose a suitable system for the treatment of the combustion gases of the thermoelectric company (ETE) "Carlos Manuel de Céspedes" that allows its use as a nutrient in the intensive cultivation of marine macroalgae. The treatment scheme for 120 m3/h of combustion gases was evaluated using the Aspen HYSYSYS software, which allowed the selection of a suitable alternative according to the specific characteristics of the process, which consists of the use of a bubbling column using water to remove the particulate matter present in the ETE combustion gases due to the fact that the SOx and NOx concentrations are in the Ulva Lactuca assimilation range. The main dimensions of the tower were determined using the software, resulting in a diameter of 0.6m, a height of 4.2m and a residence time of 300s for the liquid. The proposal for an automatic control system was made considering a pH of 6.8 as a fundamental control parameter of the Ulva Lactuca crop. The technical-economic analysis of the proposed investment indicated that it is feasible to carry out the project with a NPV of $862607.82, an IRR of 36% and a payback period of approximately 3.3 years. The environmental impact implies a reduction of about 849 t/year in CO2 emissions into the atmosphere.
In the current century, research projects aimed at developing a viable technology for obtaining algal biomass from seaweeds have intensified. The present work aims to carry out a study to propose a suitable system for the treatment of the combustion gases of the thermoelectric company (ETE) "Carlos Manuel de Céspedes" that allows its use as a nutrient in the intensive cultivation of marine macroalgae. The treatment scheme for 120 m3/h of combustion gases was evaluated using the Aspen HYSYSYS software, which allowed the selection of a suitable alternative according to the specific characteristics of the process, which consists of the use of a bubbling column using water to remove the particulate matter present in the ETE combustion gases due to the fact that the SOx and NOx concentrations are in the Ulva Lactuca assimilation range. The main dimensions of the tower were determined using the software, resulting in a diameter of 0.6m, a height of 4.2m and a residence time of 300s for the liquid. The proposal for an automatic control system was made considering a pH of 6.8 as a fundamental control parameter of the Ulva Lactuca crop. The technical-economic analysis of the proposed investment indicated that it is feasible to carry out the project with a NPV of $862607.82, an IRR of 36% and a payback period of approximately 3.3 years. The environmental impact implies a reduction of about 849 t/year in CO2 emissions into the atmosphere.
Descripción
Palabras clave
Empresa Termoeléctrica “Carlos Manuel de Céspedes”, Cienfuegos, Ulva Lactuca, Macroalgas Marinas, Gases de Combustión, Medio Ambiente