How does an enamel-lined reaction kettle achieve heat exchange?

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An enamel-lined reaction kettle needs to be equipped with heat exchange facilities when in use. However, the heat exchange method in the reaction vessel is limited by the structure of the vessel; generally, the heat exchange area provided by the conventional external jacket around the vessel is limited. Moreover, the larger the diameter of the vessel, the smaller the heat exchange area available for its volume, even though the amount of reactant material continues to increase. At this time, it will inevitably cause great difficulties at work. At this point, it is necessary to consider the heat exchange area; that is, the amplification effect cannot be ignored. Therefore, in industry, the following methods are mainly used for heat exchange at present. 1. In an enamel-lined reaction kettle as listed at http://www.chinaynrq.com, in addition to the jacket for heat exchange, spiral tubes can also be installed inside the kettle to increase the heating surface area accordingly. 2. The external heat exchange of the enamel reactor varies depending on the circumstances. A pump can be installed outside the reactor to enable the liquid to circulate outside the reactor for heat exchange; when a low-boiling-point solvent is used in the reaction process, a condenser must be added outside the reactor in order to recover the solvent and control the reaction temperature, thereby achieving an optimal heating area. It should also be noted that when enamel-lined reaction kettle equipment is not in use for an extended period of time, it is necessary to clean both the inner and outer walls of the container using warm water. The kettle body must be wiped regularly, and its exterior as well as the interior lining need to be kept clean in order to ensure long-term stable operation. It is also necessary to check the condition of the entire equipment as well as the reducer; if the lubricating oil in the reducer is low, it should be replenished promptly. The electric heating medium oil in enamel reaction kettles needs to be replaced every six months. Regular inspections should be carried out on safety valves, pressure gauges, temperature gauges, electrical instruments, and other devices located in areas such as the jacket and cover; any faults detected must be addressed by replacing or repairing them promptly.