本文提出采用中间再热前置循环,改造陈旧落后的大量中压电站。估算表明,既可增加装机容量30～40%,又可将中压电站的热效率提高到超高压水平。其节煤量大约比高压前置循环高出1倍左右,而每亿元投资的十年节煤价值高出2～4倍,约达1.5～ This paper proposes the use of intermediate reheat pre-circulation, transformation of a large number of obsolete medium-voltage power station. Estimates show that not only can increase the installed capacity of 30 to 40%, but also the thermal efficiency of medium voltage power plant to raise the level of ultra high pressure. The amount of coal saved about 1 times higher than the high-pressure pre-cycle, while the investment of 10 billion yuan per 10 million yuan higher than the value of coal is about 2 to 4 times, about 1.5 ~