褐煤锅炉SCR入口烟温高和制粉干燥出力不足问题分析及改造

李红智; 姚明宇; 徐党旗; 聂建平

English

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褐煤锅炉SCR入口烟温高和制粉干燥出力不足问题分析及改造

热力发电 2014年43卷第6期页码：141-144

现场经验交流 | 更新时间：2025-09-28

- 褐煤锅炉SCR入口烟温高和制粉干燥出力不足问题分析及改造
- Overhigh flue gas temperature at SCR inlet and insufficient drying capacity of pulverizing system in lignite boilers:reason analysis and countermeasures
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： TK229.6
- 纸质出版：2014
- 稿件说明：
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李红智, 姚明宇, 徐党旗, 等. 褐煤锅炉SCR入口烟温高和制粉干燥出力不足问题分析及改造[J]. 热力发电, 2014,43(6):141-144.

LI Hongzhi, YAO Mingyu, XU Dangqi, et al. Overhigh flue gas temperature at SCR inlet and insufficient drying capacity of pulverizing system in lignite boilers:reason analysis and countermeasures[J]. Thermal Power Generation, 2014, 43(6): 141-144.
李红智, 姚明宇, 徐党旗, 等. 褐煤锅炉SCR入口烟温高和制粉干燥出力不足问题分析及改造[J]. 热力发电, 2014,43(6):141-144. DOI：

LI Hongzhi, YAO Mingyu, XU Dangqi, et al. Overhigh flue gas temperature at SCR inlet and insufficient drying capacity of pulverizing system in lignite boilers:reason analysis and countermeasures[J]. Thermal Power Generation, 2014, 43(6): 141-144. DOI：

摘要

针对褐煤锅炉普遍存在的SCR入口烟温高和制粉系统干燥出力不足问题

在分析比较各种技术改造方案的基础上

提出了在省煤器前增加旁路烟道

在旁路烟道内分别增加热一次风再加热管式空气预热器和低压省煤器在降低烟温的同时加热热一次风的综合优化改造方案

该方案经系统热力计算、制粉系统干燥出力计算、管式空气预热器核算、低压省煤器核算等

证明安全可行且高效经济。在某褐煤锅炉实施后

发电标准煤耗降低了4.14g/(kW·h)

改造总静态投资1 536.9万元

约4.3年可收回投资。

Abstract

On the basis of comparing all kinds of related retrofitting solutions

the optimization solution solving such problems as high flue gas temperature at SCR inlet and insufficient drying capacity of the pulverizing system was put forward.This scheme arranges parallel flue pass at the economizer inlet and adds tubular air preheater low-pressure economizer inside the parallel flue pass

which can take use of the flue gas heat to heat the primary air.Moreover

analysis such as thermodynamic calculation

drying capacity calculation for the pulverizing system

air preheater arrange calculation and low-pressure economizer calculation were performed

which verifies this solution is safe and economic.Application of this solution in a lignite coal fired boiler shows that

the standard coal consumption rate for power generation reduced by 4.14g/(kW·h)

which achieved the expected goal.The total static investment of this retrofit scheme is 1.536.9×107yuan

which can be returned within 4.3years.

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