In the synthesis reaction process, it is often necessary to raise, keep or lower the temperature of the reaction. If the operation or control is improper, it may cause defective products, which is not conducive to production. The circulation device that provides heat and cold sources for various reactors and reactors can effectively ensure the accuracy of the temperature, and through unmanned automatic temperature adjustment, production efficiency is improved, and costs are saved for users.
In the process of pharmaceutical synthesis and fine chemical operation, we often encounter strong exothermic reactions such as oxidation reaction and acid-base neutralization. For these strong exothermic reactions, if the control is improper or the equipment is not powerful, it is easy to cause reliable accidents or Defects of low production efficiency.
The temperature in the reaction stage of the reactor is not a linear process. It is affected by various factors such as exothermic, endothermic, reaction rate, etc. Pure PID control cannot be controlled. It is very difficult to realize fully automatic control and needs to be established. The mathematical model adopts a special medical reactor heating unit to control the temperature.
In the process of continuous and stable exothermic reaction, it is necessary to continuously pass cooling water into the jacket of the reactor to cool down to barely maintain the balance of cooling and heating. This is called “draining from the bottom of the kettle”. Boiler overflow or larger reliable accidents, the main reason is that the heat exchange area per unit volume of the reactor is too small, and the simple jacket cooling is far unable to meet the cooling energy requirement of the exothermic process.
The medical reactor heating unit is based on the predictive fuzzy self-tuning PID integrated control technology to realize the temperature control of the reactor. The main idea is to use the predictive output of the system model, combined with the conventional PID control experience, and adopt the fuzzy inference method to control the controller algorithm. Improve.
Compared with the usual PID control scheme, the medical reactor heating unit improves the robustness and adaptability of the system, and better solves the problem of reactor temperature control.