There are various types of chemical equipment, and there are various classification methods, such as carbon steel equipment, stainless steel equipment, and non-metallic equipment according to their structural materials. According to the pressure, it can be divided into high-pressure equipment, medium pressure equipment, vacuum equipment, atmospheric equipment, etc. According to their usage functions, they are roughly classified as follows: (1) Chemical containers: tanks, tanks, kettles, etc; (2) Separation tower type: including packing tower, float valve tower, bubble cap tower, rotary table tower, etc. (3) Reactors: There are tubular reactors, fluidized bed reactors, stirred tank reactors, etc. (4) Heat exchangers: There are tube type, plate type, and coil type heat exchangers. (5) Heating furnace: electric heating furnace, tubular cracking furnace, waste heat boiler, etc; (6) Crystallization equipment: solution crystallizer, melting crystallizer, etc. (7) Other specialized chemical equipment, etc.