由于燃烧技术落后，供煤不合理而形成煤炭利用率低和环境污染严重的燃烧现状。
It causes both serious environment pollution and great coal waste since the old technologies and equipments in coal-burning and unreasonable supply of coal in various utilization.
煤炭、石油、天然气都是不可再生资源，如何提高能源利用率、节约矿产资源显得更加重要。
Coal, petroleum and natural gas are unrenewable resources, so it is important to improve energy utilization and save mineral resources.
煤炭的研磨过程能耗高、能量利用率低。
With low utilization efficiency, the energy consumption is extremely high during coal grinding process.
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