煤的热解是指煤从固相变为气、固、液三相产物的过程。
Coal pyrolysis refers to coal from solid phase into the gas and solid, liquid three-phase product process.
可燃成分是指煤中的挥发分和固定碳，它们是产生热量的来源，而其中不可燃成分为灰分和水分等。
The combustible composition implies the volatile and fixed carbon, which is the source of generating heat. The incombustible part contains water and dust, etc.
“清洁煤”是由行业在几十年前创造的术语，指行业为了减少当地的污染而作的努力。
"Clean coal" is a term coined by the industry decades ago, referring to its efforts to reduce local pollution.
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