330 MW 循环流化床锅炉深度调峰技术
摘要：为推进“双碳”政策的实施，消纳波动性较强的新能源并网发电，当前对火电机组的深度调峰要求越来越高。循环流化床(circulating fluidized bed，CFB)锅炉机组在深度调峰低负荷运行工况有着先天优势，但实现20%以下的超低负荷运行依然面临众多的困难，如炉内流化的稳定性、氮氧化物的排放及炉内局部超温带来的安全性等问题。以某330 MW CFB锅炉的深度调峰技术应用为例，介绍了输煤筛分破碎系统、风帽节流圈、下二次风管等机组部件的改造，并配合烟气再循环等技术应用，成功实现了18%的超低负荷深度调峰运行，同时也很好地控制了NO x 的排放。最后总结了CFB机组超低负荷深度调峰技术的关键点和难点，对深度调峰运行带来的潜在问题进行了分析，并提出了相应的解决措施。研究结果具有重要的工程借鉴作用。
Abstract:To promote the implementation of the “double carbon” policy and to manage the high volatility of new energy, the current requirements for deep peak shaving of thermal power units are getting higher and higher. Circulating fluidized bed (CFB) boiler units have inherent advantages under low load operation conditions. However, the ultra-low load operation below 20% still faces many difficulties, such as the stability of the fluidization in the furnace, the emission of nitrogen oxides, and the safety issues caused by local over-temperature in the furnace. This paper took the application of deep peaking technology of a 330 MW CFB boiler as an example and introduced the modification of the unit components, such as the coal conveying screening and crushing system, throttling rings of wind caps and lower secondary air pipes, etc. With the application of flue gas recirculation and other technologies, an 18% ultra-low load operation was successfully realized on this CFB boiler, and the NO x emission was also well controlled. The key points and difficulties of the ultra-low load operating technology of CFB unit were summarized. The potential problems caused by deep peaking operation were analyzed, and corresponding measures were proposed. The results of this study have an important engineering reference value.
标题：330 MW 循环流化床锅炉深度调峰技术
title:Deep Peak Shaving Technology for 330 MW Circulating Fluidized Bed Boiler
作者：张思海, 李超然, 万广亮, 刘印学, 徐海楠, 黄中, 杨海瑞
authors:Sihai ZHANG, Chaoran LI, Guangliang WAN, Yinxue LIU, Hainan XU, Zhong HUANG, Hairui YANG
关键词：火电机组,循环流化床(CFB)锅炉,深度调峰,超低排放,烟气再循环,
keywords:coal-fired power unit,circulating fluidized bed (CFB) boiler,deep peak shaving,ultra-low emission,flue gas recirculation,
发表日期：2024-04-30
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