Distillation tower refers to the chemical equipment made of rare metal titanium and other materials and their alloy materials. The distillation tower is a chemical equipment made of rare metal titanium and its alloy materials, which has the characteristics of high strength, high toughness, high temperature resistance, corrosion resistance and light specific gravity. Therefore, it is widely used in chemical industry, petrochemical industry, metallurgy, light industry, textile, alkali, pharmaceutical, pesticide, electroplating, electronics and other fields.