Institute of Resources and Environment Engineering,Shanxi University
State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources,Shanxi University
Shanxi Guojin Coal and Electricity Co.,Ltd.

随着可再生能源的快速发展,对火电机组深度调峰提出了更高的要求。以亚临界循环流化床锅炉(CFB)焖炉压火方式参与近零深度调峰为基础,建立一套近零深度调峰蓄释热量的计算方法,为后续多次进行近零深度调峰提供指导。基于对亚临界CFB机组在近零深度调峰过程中锅炉各有蓄热能力部分的具体分析,提出了一套针对CFB近零深度调峰过程中蓄释热量的计算方法,并将此方法应用于山西省某300MW亚临界CFB机组的近零深度调峰运行实践。应用计算方法得出,锅炉视在蓄热总量为415.5GJ,其中浇注层、金属壁、床料载体、汽水、烟气视在蓄热量分别为205.6、140.4、32.7、11.1、36.8GJ。汽轮机做有效功的总热耗量为65.2GJ,锅炉本体散热为6.1GJ,数据展示了各蓄热部分随近零深度调峰过程的下降趋势。该计算方法实现了对亚临界循环流化床蓄释热量的量化计算,为后续预测指导近零深度调峰时长,研究锅炉的严密性和传热特性,以及为获得更多蓄热量提升蓄热效率和改善锅炉性能提供了数据支持。

With the rapid development of renewable energy,higher requirements are put forward for deep peak regulation of thermal powerunits. On the basis of subcritical circulating fluidized bed boiler (CFB) furnace fire pressure participating in near-zero depth peak regulation,a set of calculation method of near - zero depth peak regulation storage and release heat was established,which provided operation guidance for subsequent near-zero depth peak regulation. Based on the concrete analysis of each part of the boiler with heat storage capacity in the process of near-zero depth peak regulation of subcritical CFB unit,a set of calculation method of heat storage and release in the process of near-zero depth peak regulation of CFB was proposed,and this method was applied to the near-zero depth peak regulation operation practice of a 300 MW subcritical CFB unit in Shanxi Province. By using the calculation method,it is concluded that thetotal apparent heat storage of boiler is 415.5 GJ,and the apparent heat storage of casting layer,metal wall,bed material carrier,soda andflue gas are 205.6,140.4,32.7,11.1 and 36.8 GJ respectively. The total heat consumption of effective work done by steam turbine is65.2 GJ,and the heat dissipation of boiler body is 6.1 GJ. The data show the downward trend of each heat storage part with the process ofnear-zero depth peak regulation. This method realizes the quantitative calculation of the heat storage and release of the subcritical circulating fluidized bed,guides the near-zero depth peak regulation time for the follow-up prediction,and studies the tightness and heat transfer characteristics of the boiler. it also provides data support for finding out how to obtain more heat storage to improve the heat storage efficiency and improve the performance of the boiler.

吕梁市“揭榜挂帅”重大创新需求资助项目(2022JBGS02);山西省研究生教育创新资助项目(2022Y155)

杨凤玲,张普森,张圆圆,等.亚临界循环流化床机组近零深度调峰蓄释热计算及实践[J].洁净煤技术,2024,30(9):77-84.

YANG Fengling,ZHANG Pusen,ZHANG Yuanyuan,et al.Calculation and practice of near-zero depth peak regulation,heatstorage and release in subcritical circulating fluidized bed unit[J].Clean Coal Technology,2024,30(9):77-84.