Resumo: Numa indústria de extração de óleo de soja, há diversas etapas desde que o grão sai do campo até a obtenção do óleo refinado, pronto para o consumo humano. Dentre essas etapas, a preparação dos grãos apresenta grande importância no processo, pois representa potencial para se obter significativo aumento no rendimento da extração. Ainda, a preparação dos grãos apresenta duas subetapas de grande importância, sendo elas o condicionamento dos grãos e a expansão da massa. Estas subetapas ocorrem no interior do condicionador e no interior do expander, respectivamente. No condicionador ocorre o pré-cozimento dos grãos por injeção indireta de vapor. Já a expansão ocorre por meio do contato direto com vapor a pressões mais altas que a atmosférica, o que ocasiona diversas mudanças na massa que vai sofrer o processo de extração. Neste trabalho foi realizado um estudo sobre a redução do consumo de vapor utilizado no expander, utilizando-se parcialmente o condensado proveniente do condicionador vertical. Este condensado passou por um tanque de flash e o vapor formado foi direcionado ao expander, diminuindo assim a quantidade utilizada de vapor proveniente da caldeira. Palavras-chaves:Expander, vapor flash, recuperação de condensado. Abstract:In an industry of extraction of soybean oil, there are several steps since the grain leaves the field to obtain the refined oil, ready for human consumption. Among these steps, the preparing of the grains has great importance in the process because it represents potential to achieve significant increase in the yield of extraction. Still, the preparation of grain has two sub-steps of great importance. They are the conditioning and the expansion of the grain mass. These sub-steps take place inside the conditioner and the interior of the expander, respectively. In the conditioner occurs the pre-cooking of the beans through indirect injection of steam. In the expander occurs the expansion of the grains through direct contact with steam at pressures higher than atmospheric pressure, which causes several changes in the mass that will suffer the extraction process. In this work we present a study on reducing the consumption of steam used in the expander, using partially the condensate from the vertical conditioner. This condensate passed through a flash tank and the steam formed was directed to expand, thereby decreasing the amount used steam from the boiler.
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