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首页> 外文期刊>Journal of food engineering >Modelling of a milk powder falling film evaporator for predicting process trends and comparison of energy consumption
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Modelling of a milk powder falling film evaporator for predicting process trends and comparison of energy consumption

机译：奶粉降膜蒸发器的建模，以预测过程趋势并比较能耗

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In this study, two commonly used types of milk powder evaporators: a conventional five-effect falling film evaporator without mechanical vapour recompression (MVR), and a three-effect evaporator with MVR were modelled in a commercial process simulator. The objectives were to predict the process variable trends (temperature profile along the tube side and the shell side of the evaporator) and to compare energy consumption for the two types of evaporators. Heat-recovery processes were integrated into the model so that energy consumption could be compared for the two processes. The size of the evaporator required was also estimated so that so that operating and capital costs could be assessed. The model prediction results were validated using industrial data from a local milk powder plant. The developed model successfully predicted temperature profiles similar to industrial evaporator. Furthermore, energy comparison between two types of evaporators was consistent with a known fact that a three-effect falling-film evaporator with MVR could consume 60% less energy than a conventional five effect evaporator. These developed models in a commercial process simulator are novel in the dairy industry and can be used for simulating heat-recovery integrated evaporation processes but they still remain sufficiently generic and flexible to be applied to other production processes. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在这项研究中，在商业过程模拟器中对两种常用的奶粉蒸发器类型进行了建模：传统的五效降膜式蒸发器（不带机械蒸汽再压缩（MVR））和三效式带MVR的蒸发器。目的是预测过程变量趋势（沿蒸发器管侧和壳侧的温度曲线），并比较两种类型的蒸发器的能耗。将热回收过程集成到模型中，以便可以比较这两个过程的能耗。还估算了所需蒸发器的大小，以便可以评估运营和资本成本。使用本地奶粉厂的工业数据验证了模型预测结果。开发的模型成功地预测了类似于工业蒸发器的温度曲线。此外，两种类型的蒸发器之间的能量比较符合一个已知的事实，即具有MVR的三效降膜式蒸发器比传统的五效蒸发器能耗低60％。这些在商业过程仿真器中开发的模型在乳制品行业中是新颖的，可用于模拟热回收集成蒸发过程，但它们仍具有足够的通用性和灵活性，可应用于其他生产过程。 （C）2018 Elsevier Ltd.保留所有权利。

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