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首页> 外文期刊>Experimental Heat Transfer >EXPERIMENTAL HEAT TRANSFER COEFFICIENTS OF WASTE HEAT RECOVERY UNIT IN DETERGENT MANUFACTURING PROCESS
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EXPERIMENTAL HEAT TRANSFER COEFFICIENTS OF WASTE HEAT RECOVERY UNIT IN DETERGENT MANUFACTURING PROCESS

机译：洗涤剂生产过程中废热回收装置的实验传热系数

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摘要

The waste heat recovery unit is one of the most important units in the chemical process. It recovers waste heat from the exhaust gas of the process resulting in the reduction of heat loss. In the detergent manufacturing process, the particulate air leaving the spray dryer is the exhaust gas containing the large amount of heat. Therefore, a waste heat recovery unit can significantly reduce heat loss. In this work, heat transfer coefficients of a waste heat recovery unit in the detergent manufacturing process were studied. Waste heat from the particulate air is recovered in the shell and coiled tube heat exchanger. The particulate airflows in the shell side, and water flows in the tube side. Four coiled tubes with different coil pitches were investigated. The results show that the tube-side heat transfer coefficient increases as the coil pitch decreases. Loading ratio also has an important effect on heat transfer coefficients. The increase of loading ratio leads to a lower value of the overall heat transfer coefficient. From 100 experiments, empirical correlations for the prediction of tube-side and shell-side heat transfer coefficients were proposed. The results indicate that the predicted heat transfer coefficients agree well with the experimental values.
机译：废热回收单元是化学过程中最重要的单元之一。它从该过程的废气中回收废热，从而减少了热损失。在洗涤剂制造过程中，离开喷雾干燥器的颗粒空气是包含大量热量的废气。因此，废热回收单元可以显着减少热损失。在这项工作中，研究了洗涤剂制造过程中废热回收单元的传热系数。来自颗粒空气的废热在壳体和盘管式热交换器中回收。颗粒气流在壳侧，水在管侧。研究了四种不同螺距的盘管。结果表明，随着线圈螺距的减小，管侧传热系数增大。负载率对传热系数也有重要影响。负载比的增加导致总传热系数的值降低。从100个实验中，提出了用于预测管侧和壳侧传热系数的经验相关性。结果表明，预测的传热系数与实验值吻合良好。

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