低品位工业余热应用于城镇集中供暖系统若干关键问题及解决方法
Key issues and solutions of lowgrade industrial waste heat applied to urban centralized heating systems
摘要：
在开展低品位工业余热集中供暖的实践过程中，需解决余热高效采集、整合、输配、调节等关键问题，应将热源、热网、末端用户三者视为整体，统筹优化，打破低品位工业余热应用于城镇集中供暖的技术障碍。以分析法为理论基础，以温度热流量（TQ）图为理论工具，针对上述关键问题进行了技术和方法层面的研究。结合在河北省迁西县实施的钢厂低品位工业余热集中供暖工程实例进行了阐述，论证了本文所述方法的正确性和有效性，供低品位工业余热应用于城镇集中供暖的工程实践参考。
Abstract：
In the practical process of using lowgrade industrial waste heat for centralized heating, it is necessary to solve the key issues of high efficient collection, integration, transmission and regulation of the waste heat, which need to consider the heat source, heating network and end users as a whole and to break technical barriers. Applies the entransy analysis method and the TQ diagram to researching the techniques and methodologies for solving the key issues. Presents an established demonstration project of using the lowgrade industrial waste heat of steel plants for centralized heating in Qianxi, Hebei Province, which validates the correctness and effectiveness of the theory and methodology, providing a reference for more relevant practices in the future.
Keywords:lowgrade industrial waste heat, entransy analysis method, centralized heating, absorption heat pump, return water temperature