Conical heads are flow-guiding and pressure-bearing components for special boilers

Conical heads are used in the solid-liquid separation zone of reactors, with a cone angle of 30°-60° being the optimal process angle. The cone is unfolded into a fan-shaped plate, pre-bent by a three-roll bending machine, and then locally heated to 650°C using medium-frequency induction heating. The conical surface is formed by mechanical top pressure. Longitudinal seams are completed using submerged arc welding (SAW), and argon arc welding is used for the root pass to ensure a smooth inner wall and prevent material residue. A forged flange ring is used at the cone apex interface, assembled with interference fit through a heat shrinking process, increasing the pressure-bearing capacity by 30%.
Conical heads are often used in special equipment such as waste heat boilers and waste incineration boilers, playing a role in environmental protection and energy recovery. They can guide fluid flow and withstand a certain amount of pressure. They are processed using wear-resistant alloy steel plates as raw materials, first numerically controlled cutting into fan-shaped blanks, and then folded into a cone shape through a hot pressing process to ensure precise taper. After forming, CNC boring is performed to trim the port flatness and bevel angle, facilitating welding with the boiler cone section. Finally, non-destructive testing and anti-corrosion treatment are carried out to improve corrosion resistance in complex media environments and ensure the long-term stable operation of special boilers.