The design of the semi-circular reaction kettle is not a "panacea", but it plays a crucial role in certain specific processes. Here are its practical performances in the three popular manufacturing fields:
1. Fine chemical industry: the "safety guard" of strong exothermic reactions. In nitration, sulfonation, diazotization and other reactions, a large amount of heat is released instantly in the early stage of the reaction. If it cannot be removed in time, it is easy to cause material flushing or even explosion. Solution: The semi-circular tube reaction kettle adopts segmented heat exchange control. Different media can be independently introduced into the semi-circular tubes at the upper and lower parts of the kettle body. When the reaction is intense, a large flow of cooling water is introduced into the semi-circular tubes of the kettle body, and its ultra-high heat transfer coefficient is used to quickly remove heat. When insulation is needed in the later stage of the reaction, it is switched to hot water or steam to achieve precise temperature step control.
2. Polymer materials: "Mixing partners" for high viscosity materials. When producing high viscosity resins, rubbers, or adhesives, the materials are prone to sticking and carbonizing on the kettle wall, forming "wall hanging", which seriously affects product quality. Solution: The smooth inner wall of the kettle body is combined with an efficient heat exchange system to rapidly reduce (or increase) the temperature of the materials near the wall, change their fluidity, and reduce wall sticking. At the same time, the outer space left by the semi-circular tube structure allows for the installation of a high torque top mixer, avoiding the mixing support problem caused by excessive jacket thickness.
3. New energy materials: The synthesis of precursor materials for lithium-ion battery cathode materials (such as ternary precursor co precipitation reaction) is extremely sensitive to temperature fluctuations, and deviations of ± 1 ℃ may lead to uneven crystal particle size. Solution: The spiral channel of the semi-circular reaction kettle ensures a constant circulating water temperature, and with the PID automatic control system, the reaction temperature fluctuation can be controlled within a very small range, thereby ensuring stability and consistency between batches.