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针对烧结余热发电系统运行稳定性差及停机率较高的问题,基于概率理论建立了多台烧结余热锅炉并联运行发电系统数学模型,分析了余热锅炉工作状态对余热发电系统稳定运行的影响,提出了烧结余热锅炉与发电系统稳定运行方案和蒸汽量调控策略.现场数据表明,多台余热锅炉并联运行,发电机组运行稳定性改善;4台余热锅炉并联共用1台发电机组的烧结余热发电系统,3台及以上余热锅炉正常工作,即可保证系统稳定运行概率大于0.98;当系统蒸汽量不足时,通过管网调入蒸汽,发电系统稳定运行概率可达到0.96以上.

Focusing on the issues of poor operation stability and higher outage rate for sintering waste heat power gener-ation system,a mathematical model of multi waste heat boilers paralleling operation power system was constructed based on the theory of probability. The influence of the working status of waste heat boilers on the operation stability of the waste heat power generation system was analyzed. The operation program of waste heat boiler and system steady run-ning,and regulation strategy of steam were put forward. Adopted the in situ steam flow data,the results showed that the operation stability of power generation system would be improved through parallel operation of multiple waste heat boil-ers. For the sintering waste heat power generation system of four sets of waste heat boilers in parallel shared a generator, the system stable operation probability would exceed 0.98 if three or more waste heat boilers were in normal work. When the system steam was insufficient,the stable operation probability of power generation system could reach above 0.96 through the import of steam from steam network.