基于增设小粉仓的新型制粉系统方案设计及控制策略研究  

Scheme design and control strategy of a novel coal pulverizing system based on addition of small pulverized coal silos

作　　者：丁思变 谭亲雄 丁宏宇 杨涛[1] DING Sibian;TAN Qinxiong;DING Hongyu;YANG Tao(School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《热力发电》2024年第11期79-88,共10页Thermal Power Generation

基　　金：国家重点研发计划项目(2022YFB4100400)。

摘　　要：针对直吹式制粉系统存在制粉响应慢、控制精度差等问题,研究设计了基于增设小粉仓的新型制粉系统,并提出了相应的风粉控制策略。基于超超临界机组动态仿真模型,对新型制粉系统运行及控制策略进行了仿真验证。仿真结果表明,提出的控制策略能够实现风粉参数的快速准确响应,且在75%~85%的额定负荷变化范围内进行的负荷响应仿真试验中,在小粉仓投入运行后,机组模型的负荷响应速率可以达到5%/min,且能更快恢复稳定。所提出的新型制粉系统及其运行控制策略显著提升了机组灵活性,为煤粉锅炉灵活性提升研究提供了可行的技术途径与指导性建议。To solve the problems of slow milling response and poor control precision occurred in direct-blow pulverizing systems,a novel pulverizing system adding small pulverized coal silos is designed,and the corresponding air-powder control strategy is proposed.Moreover,based on the dynamic simulation model of an ultra-supercritical unit,the operation and control strategy of the novel pulverizing system is simulated and validated.The results demonstrate that,the proposed control strategy enables precise and rapid response of air-powder parameters.In the load response simulation tests conducted within the load variation range of 75%~85%of rated load,after the small pulverized coal silos were put into operation,the load response rate of the unit’s model can reach 5%/min and recover stability faster.Therefore,the novel pulverizing system and its operational control strategy significantly enhance the unit flexibility.The research provides a viable technical approach and guidance for improving the flexibility of coal-fired boilers.

关 键 词：制粉系统 小粉仓 灵活性 控制策略 

分 类 号：TM621[电气工程—电力系统及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]