Análise numérica da eficiência de separação gás-líquido do lavador de gás da Arcelormittal Monlevade

• Ano de defesa: 2012
• Autor(a) principal: Hugo Leonardo de Freitas
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Gás-líquido; Metodologia; Simulação numérica; Eficiência; Separação; Engenharia mecânica
• Link de acesso: http://hdl.handle.net/1843/BUBD-92EJJE

The steel production process results in the generation of gases charged with solid particles, current environmental legislation does not allow disposal of these gases into the atmosphere without treatment and particles concentration above the emission limits. For the treatment of gases generated in the ArcelorMittal Monlevade Converters LD there is a system that collect and clean the gases, this system passed through arevamp in order to attend the improvement of the converters nominal production capacity and the particle emission limits established by environmental law. However this project a component of this system, called droplet separator was not modified, this component is responsible for the process of gas-liquid separation, a low efficiency in this process results in operational and maintenance problems in the exhaust system,because the moisture present in the gas also carries dissolved particles that build up on the fan impeller. During the normal production cycle the fan operates varying the exhaust system pressure continuously, this condition over time causes the detachment of material fixed on the walls and blades of the impeller, this situation leads to unbalancing the impeller. When this situation occurs it is necessary to stop the production process and to clean the impeller by water high pressure jet, this operation takes about six hours, and it must be performed on average every 15 days, representing a significant annual production loss. The objective of this work is to study the gas-liquid droplet separator efficiency and propose modifications to this equipment that promote an efficiencyincrease this gas cleaning system component. The methodology used is the fluid dynamic modeling and numerical simulation of the equipment considering the equipment original situation with its process conditions and two proposals for improving the gas-liquid separation efficiency. The results show that it is possible to obtain an increasing of the gas-liquid separation efficiency about 25% for the first proposal, and 28% for the second proposal. From these results we can conclude that the aim set for the work was reached.