Protótipo de um recuperador de calor para resfriamento rápido de gases de incineração de resíduos perigosos

• Autor(a) principal: Costa, Rodrigo Caetano
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/727
• topic: Resíduos perigosos; Protótipo; Perdas de carga; Hazardous waste; Prototype; Pressure drop; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA

This paper presents the stages of development and construction of a prototype of a shell and tube heat recovery for reuse heat energy of the products generated by combustion of a hazardous waste incinerator class I. The performance and energy recovered by this system were calculated. It was transported the values found for a typical plant for the incineration of 1000 kg h-1. Thus, to preheat the combustion air and drying the waste was obtained a reduction in the consumption of LPG 46 and 45% respectively. Considering the complexity of the process, it was found that the preheating system is simpler and can be deployed in a shorter time and lower cost when compared to a drying residue. It was measured the pressure drop inside and outside the beam tube and it was found that the pressure drop inside the tubes are shown close to the the predicted. The average power flow at the shell side was 47.9 W. Therefore, the goal was reached with lower expenditure of energy to flow the fluid. The demonstrated that the configuration of the arrangement of the tubes 45°, the ratio of the transverse step (ST) with the outer diameter (Do) of 1.9 and using only two baffles, contribute to this result in satisfactory of the pressure drop. The results showed that addition of calcium oxide (CaO) in the residue was effective sequestration of chlorine, which was incorporated into the ash in the form of calcium chloride. Contributing significantly to the reduction of emissions of dioxins and furans. The system of heat recovery showed high performance, especially in cooling rate, resulting in low pressure drop in both, the gas and the cold side of the fluid and contributes to reduce the formation of dioxin and furan compounds.