大型母管制锅炉负荷协调及管网控制策略研究

Research on Load Coordination and Pipe Network Control Strategy of Large-scale Master Controlled Boiler

随着我国化工行业装置规模的日趋增大,用汽单元装置向多元化和多量化发展,耦合更加严重,业内对管网蒸汽品质提出了更高的要求,如何提高各级管网的蒸汽品质及锅炉群蒸汽源与用汽单位汽量协调成为亟待解决的问题。为实现该任务,神华煤制油动力厂管网系统采用多变量解耦先控算法与负荷协调优化策略实现变负荷情况下不同压力等级的化工工艺生产装置能够在不同工况条件下安全、稳定运行,保证了锅炉产汽量与用汽单位的平衡,提高了蒸汽品质,以达到锅炉与蒸汽管网压力长期稳定运行。

With the increasing scale of the equipment in China’s chemical industry,the steam consumption units are developing towards diversification and multi quantification,and the coupling is more serious,which puts forward higher requirements for the steam quality of the pipeline network.The coordination of the steam source of the boiler group and the unit steam volume of steam consumption has become an urgent problem to be solved.In order to achieve this task,the pipeline network system of Shenhua Coal-to-Liquids Power Plant adopts multivariable decoupling prior control algorithm and load coordination optimization strategy to realize that chemical process production devices with different pressure levels under variable load can be safe and stable under different working conditions.The operation guarantees the balance between the steam output of the boiler and the steam unit,and improves the steam quality,so as to achieve the long-term stable operation of the boiler and steam pipe network pressure.