China is rich in industrial waste heat resources, which account for about 17% to 67% of its total fuel consumption, of which the recoverable rate is 60%. Waste heat boiler is important equipment in waste heat power generation system. According to different uses, waste heat boilers can be subdivided into power station waste heat boilers and industrial waste heat boilers. Compared with waste heat boilers in power plants, industrial waste heat boilers have harsh operating environments, complex design and manufacturing processes, and are mostly non-standard products.