济南主城区供暖告别“燃煤时代”

Group 1 - The core point of the article is the completion of the "Liaohotou Jinan" heating project, which is recognized as the longest heating pipeline in the country, marking the transition of Jinan's main urban area to a coal-free heating era after 40 years of coal-based heating [2] - The project has led to the shutdown of 54 coal-fired boilers in Jinan's main urban area, indicating a significant shift towards cleaner energy sources [2] - Jinan has established a new heating structure based on large clean heat sources such as Huangtai Power Plant, Zhangqiu Power Plant, Tai'an Shiheng Power Plant, and Liaocheng Xinyuan Power Plant, supplemented by emergency heat sources in the urban area [2]