Effect of H<sub>2</sub>O and HCl on oxidation of elementary mercury in oxygen-enriched combustion atmosphere

HANG Deqiang; HU Changxing; GUO Ruitang; HE Miaomiao; HAO Junke; LI Jianxin

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Effect of H₂O and HCl on oxidation of elementary mercury in oxygen-enriched combustion atmosphere

Thermal Power Generation Vol. 45, Issue 7, Pages: 72-77(2016)

更新时间：2025-09-28

- Effect of H₂O and HCl on oxidation of elementary mercury in oxygen-enriched combustion atmosphere
- 作者机构：
  
  1. 上海电力学院能源与机械工程学院
  2. 浙江大学宁波理工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK16
- Published：2016
- 稿件说明：
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HANG Deqiang, HU Changxing, GUO Ruitang, et al. Effect of H₂O and HCl on oxidation of elementary mercury in oxygen-enriched combustion atmosphere[J]. Thermal Power Generation, 2016, 45(7): 72-77.
DOI：

HANG Deqiang, HU Changxing, GUO Ruitang, et al. Effect of H₂O and HCl on oxidation of elementary mercury in oxygen-enriched combustion atmosphere[J]. Thermal Power Generation, 2016, 45(7): 72-77. DOI：

摘要

充分了解富氧燃烧气氛下汞析出形态规律

特别是明确富氧煤燃烧气氛下高H_2O和HCl含量对烟气中主要的氧化性组分Cl/Cl_2的作用

以及反应产物和组分与元素汞(Hg~0)间的相互影响规律

是富氧燃烧等新型燃烧技术背景下汞控制问题的关键。通过模拟富氧燃烧气氛实验装置

研究了燃烧温度、燃烧气氛中HCl和H_2O(g)含量对烟气中Hg~0氧化的影响。结果表明:运行温度、HCl含量与氧化性Cl/Cl_2的生成与Hg~0的氧化有较强的正相关性;模拟烟气温度越高

HCl含量越多

烟气中氧化性Cl/Cl_2生成越多

Hg~0就越容易被氧化;烟气中H_2O对Hg~0的氧化有抑制作用;HCl可改善H_2O的抑制作用

但是温度越高

H_2O的抑制作用越明显。

Abstract

The key point in the research of mercury emission control from new combustion type

such as oxy-fuel combustion

is fully understanding the speciation rules of mercury from coal combustion in O_2/CO_2 atmosphere

especially definitely understanding the influence of high H_2O and HCl concentration on major oxidizing component(Cl/Cl_2)of the flue gas

as well as the interaction rules between the reaction products and elementary mercury(Hg~0).By simulating the O_2/CO_2 atmosphere

the effect of temperature

HCl concentration and H_2O(g)concentration on oxidation of Hg~0 was experimentally investigated.The results show that

there is a strong positive correlation between the oxidation of Hg~0 and such factors as the temperature

HCl content and oxidizing Cl/Cl_2 generated.The higher the flue gas temperature

the more content of HCl and oxidizing Cl/Cl_2 generated in the flue gas

and the more easier the Hg~0 will be oxidized.H_2O(g)in flue gas inhibited the oxidation of Hg~0.HCl can buffer the inhibitory effect of H_2O(g).But the H_2O(g)'s inhibitory effect still got obvious with the temperature.

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Effect of H2O and HCl on oxidation of elementary mercury in oxygen-enriched combustion atmosphere

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Effect of H₂O and HCl on oxidation of elementary mercury in oxygen-enriched combustion atmosphere