两蒸吨以下小型工业锅炉全国有12.6万台10.5万蒸吨,年耗煤7500吨,效率由40％提高到60％,年节煤800万吨。一般认为更新小锅炉设备本身三个因素,大体上它们对提高效率的数值分别是8％、4％、8％。而对于设备本身又可采用更新的改造两种办法。这三个因素的节煤比例(用于起作用的次序不同)为30～50％、9～27％、30～50％。所需投资0.5、1.0和41亿元(改造则为21 Two small steam boilers below the country has 126,000 units 105,000 tons of steam, the annual coal consumption of 7,500 tons, the efficiency increased from 40% to 60%, the annual saving of 8,000,000 tons. It is generally believed that there are three factors for updating the small boiler equipment itself. In general, their values ​​for improving efficiency are 8%, 4% and 8% respectively. For the device itself can be updated using two methods. The proportions of coal-saving (the order in which they work) for these three factors are 30-50%, 9-27%, 30-50%. The required investment is 0.5, 1.0 and 4.1 billion yuan (transformation is 21%