Waste Heat Recovery Boiler (WHRB) convert high-temperature dust-laden waste gases from non-ferrous process industries such as copper, zinc, lead, aluminum, etc. The gas could come from a roaster, smelter, or converter. The waste heat content of these gases can be used to generate steam, so increasing the complete energy balance. Boilers produced for this kind of usage generally have forced circulation. The high dust content in the gases required the installation of an online cleaning system.