Steel industry is high energy-consuming industry, and its waste heat recovery\nis critically important for energy utilization. In this study, pipeline bundle is\nused to enhance heat transfer in waste heat recovery device, and associated\ngas-solid heat transfer and energy utilization performance with different\npipeline arrangement, pipe diameter and shape of internal component are\nfurther analyzed. The temperatures of gas and particle in device with pipeline\nbundle periodically fluctuate in horizontal direction, and those in staggered\nsystem distribute more uniformly than those in paralleled system. Compared\nwith paralleled device, exergy and waste heat utilization efficiency of staggered\ndevice have been improved, and they are both higher than those without\npipeline. As pipe diameter increases, exergy and waste heat utilization efficiency\nfirst increases and then decreases, and they reach the maxima with\noptimal pipe diameter. As the width of internal component keeps constant,\ninfluence of its shape on heat transfer is very little.
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