复杂煤质下锅炉燃烧精细化运行技术

Advanced Fine Combustion Operation Optimization of Boiler Subject to Complex Coal Quality

混煤掺烧可有效降低火电厂燃料成本,但导致锅炉入炉煤煤质多变且偏离设计煤种。如何在复杂煤质下保障锅炉安全、经济、环保运行,是火电厂亟待解决的重要问题。分析了当前锅炉燃烧涉及的制粉、配风、设计制造等环节的主要瓶颈问题,提出了从燃料输入的优化、锅炉燃烧设备优化改造、燃烧精细运行控制三个方面紧密协同优化的整体解决方案。重点研究和探讨了实现煤粉侧精细控制、炉内精细配风的关键监测及优化运行技术及发展应用现状。锅炉燃烧优化是一个复杂的系统工程,给出的方案为火电厂实施燃烧优化工程提供了必要的设计指导和参考。

Blended coal combustion in power plants can effectively reduce the fuel cost,but it may cause volatility of the coal quality for the boiler as well as the quality deviation from the designed coal.It is becoming an increasingly urgent problem to be resolved regarding how to maintain safe and efficient operation of boiler.In this paper,the main bottlenecks of the current boiler combustion,such as pulverization,air distribution,design and manufacturing,are ana-lyzed,and the integrated solutions are proposed in three aspects,which consist of the optimization of fuel input,boiler combustion equipment,and the fine operation control of the combustion process.The key monitoring and optimizing operation technologies for fine control of pulverized coal and fine air distribution in furnace are emphatically studied and discussed.Since boiler combustion optimization is a complex system engineering,the scheme presented in this pa-per provides necessary design guidance and reference for the implementation of combustion optimization engineering in thermal power plants.