Waste heat boiler with external evaporation tubes consisted of heat pipe waste heat recoverer within fluidized bed and flue waste heat recoverer and was brought into its first operation in a 55 kt / a pyrite-based sulphuric acid plant .

蒸发管外置式废热锅炉由沸腾层热管 废热 回收 器和烟道废热 回收 器组成，在一套55kt/a硫铁矿制酸系统中首次投入使用。