Control structure and control method of Kaibel dividing wall rectifying tower

The invention discloses a control structure of a Kaibel dividing wall rectifying tower. The control structure comprises five control loops, namely (1) a temperature control loop for pressure compensation of a lower side line section, (2) a temperature control loop of an upper side line section, (3) a tower top temperature control loop, (4) a stripping section temperature control loop and (5) a pre-fractionation section temperature control loop. The invention further provides a control method for the Kaibel dividing wall rectifying tower based on the control structure and application of the Kaibel dividing wall rectifying tower to separation of a multi-component mixture. The control method provided by the invention can stably control the large disturbance of the feeding flow or components of the Kaibel dividing wall rectifying tower, and the purity of the four separated products is qualified. 本发明公开了一种Kaibel分壁精馏塔的控制结构，包括五个控制回路：(1)下侧线段压力补偿的温度控制回路，(2)上侧线段温度控制回路，(3)塔顶温度控制回路，(4)提馏段温度控制回路，(5)预分馏段温度控制回路。本发明还提供基于上述控制结