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Abstract(s)
A presente dissertação foi realizada em ambiente industrial, na empresa Monteiro, Ribas – Embalagens Flexíveis S.A. A empresa dedica-se ao fabrico de embalagens que na sua maioria se destinam para a indústria alimentar, exportando mais de 90% da sua produção. O fabrico de embalagens inclui a impressão por rotogravura e flexografia, e a complexagem de filmes poliméricos. Tanto a etapa da impressão como a de complexagem com solventes requerem a utilização de solventes orgânicos (acetato de etilo, etanol, metoxipropanol e etoxipropanol). A unidade dispõe de sistemas de exaustão e as emissões gasosas pontuais são conduzidas para um Sistema de Recuperação de Solventes (SRU) ou um de Oxidação Térmica Regenerativa (RTO). Para além das emissões pontuais, existem emissões difusas que a empresa pretende minimizar. O objetivo desta dissertação foi avaliar e identificar os pontos mais críticos das emissões difusas de COV de modo a potenciar medidas de minimização destas emissões. Foram efetuadas medições de COV no ar interior, a diferentes alturas do solo (20, 90 e 130 cm) em toda a unidade fabril. Os resultados foram comparados com os obtidos por uma entidade externa em 2018. Observou-se um aumento significativo da concentração de COV, principalmente, na área de lavagem de tinteiros, nos recipientes de cola das máquinas de complexagem com solvente e nas unidades das máquinas de impressão. Além disso, foram avaliados diversos fatores que poderiam influenciar a concentração de COV no interior da unidade fabril, nomeadamente a temperatura, a velocidade de impressão, a utilização de solventes no processo de limpeza e ainda o efeito da ventilação. Através das MTD recomendadas no BREF STS foram avaliadas as que mais fariam sentido de serem aplicadas na MREF uma vez que, é fundamental garantir qualidade do ar interior e pensar na sustentabilidade e integração da empresa no mercado verde, nomeadamente a implementação de uma nova tecnologia de impressão sem contacto e o melhoramento dos sistemas de ventilação e exaustão.
The present dissertation was carried out in an industrial environment, in the company Monteiro, Ribas - Embalagens Flexíveis S.A. The company is dedicated to the manufacture of packaging that is mostly intended for the food industry, exporting more than 90% of its production. The manufacture of packaging includes rotogravure and flexographic printing, and the complexing of polymeric films. Both the printing and solvent complexing stages require the use of organic solvents (ethyl acetate, ethanol, methoxypropanol and ethoxypropanol). The plant has exhaust systems and point source gaseous emissions are conducted to a Solvent Recovery Unit (SRU) or a Regenerative Thermal Oxidation (RTO). In addition to point source emissions, there are diffuse emissions that the company aims to minimize. The objective of this dissertation was to evaluate and identify the most critical points of diffuse VOC emissions in order to enhance measures to minimize these emissions. Indoor air VOC measurements were carried out at different heights from the ground (20, 90 and 130 cm) throughout the plant. The results were compared with those obtained by an external entity in 2018. A significant increase in VOC concentration was observed mainly in the ink cartridge washing area, in the glue containers of the solvent complexing machines and in the units of the printing machines. In addition, several factors that could influence the concentration of VOCs inside the plant were evaluated, namely temperature, printing speed, the use of solvents in the cleaning process and the effect of ventilation. Through the BAT recommended in the BREF STS, those that would make the most sense to be applied at MREF were evaluated since it is essential to guarantee indoor air quality and think about the sustainability and integration of the company in the green market, namely the implementation of a new non-contact printing technology and the improvement of ventilation and exhaust systems.
The present dissertation was carried out in an industrial environment, in the company Monteiro, Ribas - Embalagens Flexíveis S.A. The company is dedicated to the manufacture of packaging that is mostly intended for the food industry, exporting more than 90% of its production. The manufacture of packaging includes rotogravure and flexographic printing, and the complexing of polymeric films. Both the printing and solvent complexing stages require the use of organic solvents (ethyl acetate, ethanol, methoxypropanol and ethoxypropanol). The plant has exhaust systems and point source gaseous emissions are conducted to a Solvent Recovery Unit (SRU) or a Regenerative Thermal Oxidation (RTO). In addition to point source emissions, there are diffuse emissions that the company aims to minimize. The objective of this dissertation was to evaluate and identify the most critical points of diffuse VOC emissions in order to enhance measures to minimize these emissions. Indoor air VOC measurements were carried out at different heights from the ground (20, 90 and 130 cm) throughout the plant. The results were compared with those obtained by an external entity in 2018. A significant increase in VOC concentration was observed mainly in the ink cartridge washing area, in the glue containers of the solvent complexing machines and in the units of the printing machines. In addition, several factors that could influence the concentration of VOCs inside the plant were evaluated, namely temperature, printing speed, the use of solvents in the cleaning process and the effect of ventilation. Through the BAT recommended in the BREF STS, those that would make the most sense to be applied at MREF were evaluated since it is essential to guarantee indoor air quality and think about the sustainability and integration of the company in the green market, namely the implementation of a new non-contact printing technology and the improvement of ventilation and exhaust systems.
Description
Keywords
Impressão Complexagem Solventes Emissões Difusas COV Qualidade do Ar Printing Complexing Solvents Diffuse Emissions VOC Air Quality