一、引言 煤炭是我国的主要能源,今后数十年中我国煤炭的开采和使用量都将大幅度地持续增长.为了有效地利用煤炭资源、保障人类健康和生态平衡,必须开发高效率低污染的燃煤技术.燃煤流化床具有煤种适应性强、可燃用低品位煤等优点,为充分利用煤炭资源开辟了新途径,且流化床中燃烧温度低,NO_x的生成量低,还可用石灰石等在床内脱硫,有效地降低环境污染.它与燃气轮机、蒸汽轮机等组成联合循环,可以显著地 I. INTRODUCTION Coal is the main energy source in our country and the exploitation and use of coal in our country will continue to increase substantially in the next few decades.In order to utilize coal resources effectively and ensure human health and ecological balance, we must develop high efficiency and low pollution Coal-fired fluidized bed has the advantages of strong coal adaptability and low-grade flammable coal, which opens up a new way to make full use of coal resources, and the combustion temperature in the fluidized bed is low, the NO_x generation is low, Limestone can also be used in the bed desulfurization, effectively reducing environmental pollution.It and gas turbines, steam turbines and other components of the combined cycle, can significantly