一、引言解放以来,我国城市煤气虽然得到了很大的发展,但距四化要求还相差很远,使用气体燃料的人口仅占全国城市人口的百分之几,尤其是已开始气化的中等城市,更是屈指可数。因此,燃料结构一直仍是以煤炭为主。 I. INTRODUCTION Since the liberation of China’s city gas, although it has been greatly developed, it still has a long way to go from the four modernization requirements. The population that uses gaseous fuel accounts for only a few percent of the total population of the country’s urban population, and in particular it has begun to gasify. The medium-sized cities are even fewer. Therefore, the fuel structure has always been dominated by coal.