Study on feed delay characteristics of large circulating fluidized bed boiler under variable load operation

ZHANG Rongdi; LU Xiaofeng; WANG Xueshen; GAN Zheng; ZONG Chen; YANG Zhongzhi; DONG Zhonghao; LI Jianbo; WANG Quanhai; KANG Yinhu

doi:10.19666/j.rlfd.202305082

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Study on feed delay characteristics of large circulating fluidized bed boiler under variable load operation

更新时间：2025-09-28

- Study on feed delay characteristics of large circulating fluidized bed boiler under variable load operation
- Thermal Power Generation Vol. 52, Issue 9, Pages: 39-47(2023)
- 作者机构：
  
  1. 重庆大学低品位能源利用技术及系统教育部重点实验室
  2. 四川白马循环流化床示范电站有限责任公司
  3. 重庆市特种设备检测研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202305082
  CLC： TM621.2
- Published：2023
- 稿件说明：
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ZHANG Rongdi, LU Xiaofeng, WANG Xueshen, et al. Study on feed delay characteristics of large circulating fluidized bed boiler under variable load operation[J]. Thermal power generation, 2023, 52(9): 39-47.
DOI：

ZHANG Rongdi, LU Xiaofeng, WANG Xueshen, et al. Study on feed delay characteristics of large circulating fluidized bed boiler under variable load operation[J]. Thermal power generation, 2023, 52(9): 39-47. DOI： 10.19666/j.rlfd.202305082.

摘要

目前国内设计有侧墙、后墙给煤系统的大型循环流化床（CFB）锅炉在实际运行过程中普遍存在着给煤延迟与给煤不均匀的突出问题。通过对大型CFB锅炉机组给煤延迟问题和现存给煤系统运行特点的分析，提出了大型CFB锅炉给煤线路给煤延迟问题量化计算方法，并针对某超临界600 MW CFB锅炉给煤线路案例进行计算，获得了宽负荷快速调峰工况下给煤线路的给煤延迟特性。计算结果表明：给煤延迟问题在大型CFB锅炉机组的变负荷运行过程中普遍存在，均会导致一定程度的给煤不均情况；机组变负荷幅度、变负荷速率以及单给煤线路上给煤口数量均与给煤延迟问题的严重程度成正相关关系。计算方法与分析结果可为大型CFB锅炉给煤线路适应宽负荷快速调峰运行提供设计依据和技术参考。

Abstract

In the domestic large circulating fluidized bed boilers designed with side wall and back wall coal feeding system

there are generally prominent problems of coal feeding delay and uneven coal feeding in the actual operation process. By analyzing the coal feeding delay problem of large CFB boiler units and the operation characteristics of the existing coal feeding system

the quantitative calculation method of coal feeding delay problem of large CFB boiler coal feeding line is put forward. Based on the case of a supercritical 600 MW CFB boiler coal feed line

the coal feed delay characteristics of the coal feed line under the condition of wide load and rapid peak regulation are obtained. The calculation results show that the coal feed delay problem is common in the variable load operation process of large CFB boiler units

which will lead to a certain degree of uneven coal feed. The variable load range

variable load rate and the number of coal feed ports on the single feed line are positively correlated with the severity of the delay problem. The calculation method and analysis results can provide design basis and technical reference for large CFB boiler coal feed line to adapt to wide load and fast peaking operation.

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