Fermentation tanks are widely used in industries such as dairy products, beverages, biotechnology, pharmaceuticals, and fine chemicals. The tank body is equipped with an interlayer, insulation layer, and can be heated, cooled, and insulated. The tank body and the upper and lower filling heads (or cones) are both processed using rotary pressure R-angle. The inner wall of the tank is polished with a mirror finish, without any hygiene dead corners. The fully enclosed design ensures that the materials are always mixed and fermented in a pollution-free state. The equipment is equipped with air breathing holes, CIP cleaning nozzles, manholes, and other devices.