Effect of ultra-low emission transformation process of WFGD on migration and transformation characteristics of fine particles

ZANG Wuqi; HOU Dawei; YANG Linjun

doi:10.19666/j.rlfd.202109232

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Effect of ultra-low emission transformation process of WFGD on migration and transformation characteristics of fine particles

Thermal Power Generation Vol. 51, Issue 4, Pages: 127-132(2022)

更新时间：2025-09-28

- Effect of ultra-low emission transformation process of WFGD on migration and transformation characteristics of fine particles
- 作者机构：
  
  1. 东南大学能源热转换及其过程测控教育部重点实验室
  2. 中国大唐集团科学技术研究院有限公司华东电力试验研究院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202109232
  CLC： X773
- Published：2022
- 稿件说明：
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ZANG Wuqi, HOU Dawei, YANG Linjun. Effect of ultra-low emission transformation process of WFGD on migration and transformation characteristics of fine particles[J]. Thermal Power Generation, 2022, 51(4): 127-132.
DOI：

ZANG Wuqi, HOU Dawei, YANG Linjun. Effect of ultra-low emission transformation process of WFGD on migration and transformation characteristics of fine particles[J]. Thermal Power Generation, 2022, 51(4): 127-132. DOI： 10.19666/j.rlfd.202109232.

摘要

经石灰石-石膏湿法烟气脱硫（WFGD）后燃煤烟气中细颗粒物特性会发生显著变化，具体与脱硫工艺有关。基于自行搭建的超低排放实验台及实际电厂测试数据，对WFGD超低排放工艺中细颗粒物的迁移转化特性进行了分析。结果表明：塔入口烟温70℃下塔出口细颗粒物数量与150℃下相比降低约1×106个/cm~3;5层喷淋对细颗粒物数量及质量浓度的去除效率提升11.5%和18.9%左右；增设清水喷淋和托盘、采用双循环工艺均有效降低了塔出口细颗粒物质量浓度，其中双塔双循环系统的去除效果最好，出口细颗粒物质量浓度可达10 mg/m~3以下。

Abstract

The characteristics of fine particles in flue gas after the limestone-gypsum wet desulfurization(WFGD)process are very different from those produced by coal-burning

which is related to the desulfurization process. The migration and transformation characteristics of fine particles in flue gas were analyzed by using test data of selfbuilt ultra-low emission test bench and actual power plant. The results show that

the number of fine particulate matters at the tower outlet at 70 ℃ was about 1×106/cm~3 smaller than that at 150 ℃. Compared with three-layer spraying

the removal efficiency of the number and mass concentration of fine particles of five-layer spraying increased by about 11.5% and 18.9%

respectively. Adding clean water sprayer and tray tower

as well as applying double-cycle system

can effectively reduce the mass concentration of fine particles in flue gas at the tower outlet.Moreover

the double-tower double-cycle desulphurization technology has the best removal effect

the mass concentration of fine particles at the tower outlet can reach lower than 10 mg/m~3.

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