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连续搅拌釜式化学反应器(CSTR)是重要的化工设备。对蛇管与夹套双冷却CSTR单回路温度控制方案只利用一种操纵变量,无法兼顾动态性能与静态性能的不足进行了深入分析后,提出了CSTR温度双重控制系统方案。通过双重系统的协调控制,在温度出现偏差时由蛇管冷却器快速消除温度偏差,使温度迅速返回设定值;然后由冷却效率高的夹套冷却器逐步取代蛇管冷却器所承担的冷却负荷变化——即在动态过程,由动态性能好的操作变量(蛇管冷却器)进行控制,过渡过程短,动态偏差小;在平稳生产过程,CSTR冷却负荷主要由静态性能好的操作变量(夹套冷却器)承担,冷却效率高,冷却水用量少。CSTR温度双重控制充分发挥了CSTR蛇管与夹套冷却器各自的优势,使CSTR温度控制的动态性能与静态性能都达到较为理想水平。最后,通过半实物仿真实验验证了CSTR温度双重控制在动态性能和节能降耗二方面的优越性。该双重控制方案可应用于具有类似结构特征的其他生产系统。
Continuous stirred tank chemical reactor (CSTR) is an important chemical equipment. The CSTR single-loop temperature control scheme for snake tube and jacket double cooling CSTR single-circuit temperature control scheme only uses a manipulated variable, can not take into account the dynamic performance and lack of static performance of the in-depth analysis, the CSTR dual temperature control system program. Through the dual system of coordinated control, when the temperature deviation occurs quickly by the snake tube cooler to eliminate temperature deviation, the temperature quickly returned to the set value; and then by the cooling efficiency of the jacket cooler to gradually replace the snake tube cooler bear the load changes in cooling load - In the dynamic process, controlled by a dynamically variable operating variable (serpentine cooler), the transient process is short and the dynamic deviation is small. In a smooth production process, the CSTR cooling load is mainly controlled by the static operating variables (jacket cooling ) Commitment, cooling efficiency, cooling water consumption less. CSTR temperature dual control give full play to the advantages of CSTR snake pipe and jacket cooler, CSTR temperature control of the dynamic performance and static performance have reached a more satisfactory level. Finally, the superiority of the dual control of CSTR temperature in terms of dynamic performance and energy saving is verified through a semi-physical simulation. This dual control scheme can be applied to other production systems with similar structural features.