在工业生产过程中，存在着大量具有一定温度品质的热能被放散。
In the industry production process, a lot of fine quality heat energy is wasted.
本文通过数学解析的方法，阐述了在工业企业中开展二次热能利用必须把回热利用置于首位，以促使工艺生产的强化与燃料的更大节约。
It is shown through mathematical analysis that the regenerative utilization in industry must be put in the first place so as to effect secondary utilization of thermal energy.
工业生产中的热能，约50%以低品位余热的形式直接排放，既浪费能源又污染环境。
In industrial processes, almost 50% of thermal energy transforms into low-grade waste heat discharged directly, which leads to energy waste and environmental pollution.
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