超临界循环流化床机组全负荷段深度调峰方法研究

doi:10.12096/j.2096-4528.pgt.20024

发电技术 ›› 2021, Vol. 42 ›› Issue (2): 273-279.DOI: 10.12096/j.2096-4528.pgt.20024

超临界循环流化床机组全负荷段深度调峰方法研究

牛斌¹(), 李丽锋², 孙倩¹, 张培华³

¹ 山西大学数学科学学院, 山西省太原市 030006
² 山西河坡发电有限责任公司, 山西省阳泉市 045000
³ 山西大学资源与环境工程研究所, 山西省太原市 030006

收稿日期:2020-04-18 出版日期:2021-04-30 发布日期:2021-04-29
作者简介:牛斌(1994), 男, 硕士研究生, 主要研究方向为循环流化床机组的自动控制, nbin4853@sina.com
李丽锋(1990), 男, 工程师, 主要从事超临界循环流化床机组协调控制优化和调峰调频控制工作
孙倩(1998), 女, 硕士研究生, 主要研究方向为循环流化床机组的自动控制
张培华(1957), 男, 教授级高工, 主要研究火电厂自动控制、污染物排放控制和废弃物处理

Research on the Method of Depth Peaking at Full Load of Supercritical Circulating Fluidized Bed Unit

Bin NIU¹(), Lifeng LI², Qian SUN¹, Peihua ZHANG³

¹ School of Mathematical Sciences, Shanxi University, Taiyuan 030006, Shanxi Province, China
² Shanxi Hepo Power Generation Co., Ltd., Yangquan 045000, Shanxi Province, China
³ Institute of Resource and Environment Engineering, Shanxi University, Taiyuan 030006, Shanxi Province, China

Received:2020-04-18 Published:2021-04-30 Online:2021-04-29

摘要/Abstract

摘要：

随着新能源发电装机容量不断扩大，火力发电市场受到严重挤压，为了满足电网深度调峰的需求，火电厂需要承担起深度调峰的重任，循环流化床机组可以采用停炉不停机的方式参与深度调峰。以山西某电厂超临界350MW循环流化床机组为研究对象，分析了超临界循环流化床机组2种典型汽水系统全负荷段深度调峰方法，对其中的操作要点进行了详细的阐述，并就操作过程中需要特别关注的问题进行了分析，也提出了相应的防控措施。分析表明：超临界循环流化床机组可以采用2种典型汽水系统实现全负荷段深度调峰；加装炉水循环泵系统投资大、操作复杂，增设贮水箱到除氧器管路投资小、操作简单，但是加装炉水循环泵系统参与全负荷段调峰时，各系统稳定性较好。

关键词: 超临界循环流化床机组, 深度调峰, 分离器, 贮水箱, 除氧器

Abstract:

With the expansion of installed capacity of new energy power generation, the thermal power market has been severely squeezed. To meet the needs of grid flexibility, thermal power plants are required to undertake the task of deep peak shaving. Circulating fluidized bed units can be used without shutdown. It takes a supercritical 350MW circulating fluidized bed unit in a power plant in Shanxi Province as the research object. Two kinds of deep peak shaving methods of supercritical circulating fluidized bed unit's typical steam-water systems were analyzed. Some problems that might be encountered during operation were analyzed. Corresponding prevention and control measures were provided. Finally, the analysis shows that the supercritical circulating fluidized bed unit can use two typical steam-water systems to achieve full load deep peak shaving. The investment of adding boiler water circulating pump system is large, and the operation is complex. The investment of adding water storage tank to deaerator pipeline is small, and the operation is simple. However, when the boiler water circulating pump system is added to participate in full load deep peak shaving, the stability of each system is better.

Key words: supercritical circulating fluidized bed unit, depth peaking, separator, water storage tank, deaerator

中图分类号:

TK175

牛斌, 李丽锋, 孙倩, 张培华. 超临界循环流化床机组全负荷段深度调峰方法研究[J]. 发电技术, 2021, 42(2): 273-279.

Bin NIU, Lifeng LI, Qian SUN, Peihua ZHANG. Research on the Method of Depth Peaking at Full Load of Supercritical Circulating Fluidized Bed Unit[J]. Power Generation Technology, 2021, 42(2): 273-279.

图/表 3

表1 机组主要技术参数

Tab. 1 Main technical parameters of the unit

名称	BMCR	BRL
过热器出口压力/MPa	25.31	25.31
过热器出口温度/℃	571	571
锅炉蒸发量/(t/h)	1 184	1 127.94
再热器出口压力/MPa	4.54	4.298
再热器出口温度/℃	568	568

图1 带炉水循环泵汽水系统

Fig.1 Steam-water system with furnace water circulation pump

图2 增设贮水箱到除氧器管路汽水系统

Fig.2 Steam-water system of adding water storage tank to deaerator pipeline

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超临界循环流化床机组全负荷段深度调峰方法研究

Research on the Method of Depth Peaking at Full Load of Supercritical Circulating Fluidized Bed Unit

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