对于火力发电厂而言,加大控制SO2的排放量显得非常紧迫和必要.氨法脱硫技术是采用氨(NH3)作为吸收剂除去烟气SO2的工艺,是控制酸雨和SO2污染最为有效和环保的湿法烟气脱硫技术.在氨法脱硫技术的设备中,由于存在传感器检测过程的延时问题,传统的脱硫控制系统采取PID控制无法解决该问题.运用一种预估方法能补偿延迟时间,仿真实验验证了该算法的正确性,在负荷变化中实现了氨投放量的精确控制.显著地改善了烟气氨法脱硫控制系统的动态性能,有较好地应用价值.
For the thermal power plant, increasing the control of SO2 emissions is very urgent and necessary. Ammonia desulphurization technology, which uses (NH3) as absorbent to remove SO2 flue gas in the process, is the most effective and environmental wet flue gas desulfurization technology to control the acid rain and SO2 pollution. In the ammonia desulphurization technology equipment, due to the time delay problem in the detection process of sensors, the traditional desulphurization control system which adopts PID control can't solve the problem. This paper uses a kind of forecast method that can compensate the delay time. The simulation results verify the correctness of the algorithm, the accurate control of ammonia supply has been realized in the load change. The proposed method significantly improves the dynamic performance of the control system of ammonia desulphurization of flue gas, and has better application value.