铜转炉冶炼过程中余热锅炉水位的优化控制

以110 t铜转炉冶炼过程中余热锅炉为研究对象,探讨了锅筒水位的动态特性,推导了不同扰动之间的关系.分析了传统三冲量锅筒水位控制方案的不足,引入压力参数作为补充控制量,提出了改进的优化控制方案.通过对给水流量和蒸气流量信号的合成处理,简化了静态参数配合的调试和计算,提高了整个控制系统的鲁棒性.实际应用结果表明,锅筒水位的波动范围可控制在50 mm以内,产气量达12 t,同比增加40%,蒸气温度提高30%.

Optimum Water Level Control and Realization of Waste Heat Boiler in Copper Converter Smelting Process

Waste heat boiler and the dynamic characteristic of barrel water level in the 110 t copper converter smelting process were discussed, and the relationship between different disturbances was studied. Advanced optimum control scheme was presented after the analysis of shortage in traditional three wash control scheme of boiler water level. In the new control scheme, the pressure of steam was used to be a complement control parameter. By integrating the water and steam flow signals, the robustness of the whole system was improved. And the calculation and adjustment of static parameters became simple. Results of the application show that the maximum variation of barrel water level is less than 50 mm; the output of steam reaches 12 t and the temperature of steam increases by a factor of 3/10.