Reaction vessels are widely, used in industries of petroleum, chemistry, food, medicine, farm chemistry and scientific-research, to complete the chemistry processes like aggregation, condensation, vulcanization, alkylation, hydrogen sulfide, etc. The volume range is from 0.1~10m3; about the heating methods there are jacket or coil steam heating, electrical heating, oil heating and so on. The pressure, temperature, material, stirring device kinds, rotating speed, seal structure as well as heating methods can be determined according to material production requirements and users' needs. The primary products are stainless steel reaction kettle, semicircle jacket reaction kettle, multifunctional dispersion reaction kettle, fermenting tank, seed tank, depositing tank, extracting tank, concentration crystallizing boiler and so on.