雖然已經(jīng)宣布了一些較老的亞臨界燃煤鍋爐改用天然氣，但只完成了幾次改用，幾乎沒有實際經(jīng)驗報告。工程顧問已經(jīng)發(fā)表了一些基于可行性研究和工程過程模型的關(guān)于煤到天然氣轉(zhuǎn)化的論文1,2,3，這些論文為從煤到天然氣的鍋爐的性能預(yù)期提供了指導(dǎo)。得出的結(jié)論是，亞臨界燃煤鍋爐的改造在技術(shù)上是可行的，但在不詳細(xì)調(diào)查現(xiàn)有鍋爐的狀況以確定改造后的成本和剩余壽命的情況下，其性能和財務(wù)可行性是不確定的。

Although there have been a number of announced conversions of older, subcritical coal-fired boilers to natural gas, only a few conversions have been completed and little actual experience has been reported. A number of papers1,2,3 have been published by engineering consultants on coal to natural gas conversions that are based on feasibility studies and engineering process models, which provide guidance on what to expect for performance of boilers converted from coal to natural gas. The conclusion reached is that conversion of a subcritical coal-fired boiler is technically feasible but the performance and financial feasibility is uncertain without detailed investigations of the status of the existing boiler to determine both costs and remaining life after conversion