Study about Waste Heat Recovery of Boiler Slag in Fujian

China's boilers burning 80% industrial coal,China's annual coal consumption amounted to 3.5 ~ 4 million tons,China's industrial boiler thermal efficiency reach to 72% to 80%,but the actual thermal efficiency is only 65%,while the average thermal efficiency of coal-fired industrial boilers is 80% to 85% in developed country,so the boiler energy conservation issues is urgent.The benefit of present energy saving is good for the national development strategy and long-term stability.