燃煤烟气组分对喷射稻壳活性炭脱汞的影响

doi:10.11930/j.issn.1004-9649.201901022

中国电力 ›› 2019, Vol. 52 ›› Issue (10): 150-154,184.DOI: 10.11930/j.issn.1004-9649.201901022

燃煤烟气组分对喷射稻壳活性炭脱汞的影响

陶君¹, 谷小兵¹, 黄天放², 柳帅², 胡鹏², 董璐², 黄亚继², 段钰锋²

1. 大唐环境产业集团股份有限公司, 北京 100097;
2. 东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室, 江苏南京 210096

收稿日期:2019-01-13 出版日期:2019-10-05 发布日期:2019-10-12
作者简介:陶君(1986-),男,博士,高级工程师,从事燃煤电厂烟气污染物治理技术研究,E-mail:taoj@dteg.com.cn
基金资助:
国家重点研发计划资助项目（660MW高效超超临界循环流化床锅炉发电提效技术研究，2016YFB0600203）。

Effect of Flue Gas Composition on Mercury Removal by Injecting Rice Husk-Derived Activated Carbon

TAO Jun¹, GU Xiaobing¹, HUANG Tianfang², LIU Shuai², HU Peng², DONG Lu², HUANG Yaji², DUAN Yufeng²

1. Datang Environment Industry Group Co., Ltd., Beijing 100097, China;
2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

Received:2019-01-13 Online:2019-10-05 Published:2019-10-12
Supported by:
This work is supported by National Key R&D Program of China (Research on Power Generation Promotion Technology of 660 MW High Efficiency Ultra-Supercritical Circulating Fluidized Bed Boiler, No.2016YFB0600203).

摘要/Abstract

摘要： 在0.3 MW循环流化床燃煤中试试验装置上，以卤化铵盐改性稻壳活性炭为汞吸附剂，进行了燃煤烟气喷射脱汞试验研究，考察了烟气温度、SO₂浓度、NO浓度等对脱汞效率的影响。采用ASTM标准D 6784—02（安大略法）对烟气中汞浓度进行测定。试验结果表明，随着烟气温度的升高，汞脱除效率和元素汞的转化效率均随之增加；烟气中NO可促进汞的脱除，而SO₂则抑制汞的脱除；在SCR脱硝装置入口温度为351~370℃，活性炭喷射烟气温度为191~210℃，SO₂体积分数为（293~602）×10^-6，NO体积分数为（588~893）×10^-6，活性炭喷射量为0.5 kg/h，反应空速为4 000 h^-1，烟气流量为400~500 m³/h工况下，卤化铵盐改性稻壳活性炭燃煤烟气喷射脱汞效率可达90%左右。

关键词: 燃煤烟气, 喷射脱汞, NH₄Br改性, 稻壳活性炭, 烟气组分

Abstract: The flue gas mercury removal experiment was carried out on a 0.3MW pilot scale circulating fluidized bed test facility by injecting biomass based activated carbon which is originally derived from rice husk and then modified by halogenated ammonium. Effects of exit temperature of the SCR and flue gas, concentration of SO₂ and NO on the injection demercuration efficiency were discussed. The ASTM Standard D 6784-02 (OHM Ontario Method) was applied to measure the concentration of mercury from the coal-fired flue gas. The results showed that both the mercury removal efficiency and elemental mercury conversion efficiency go up with the elevated flue gas temperature; The existence of NO can enhance the mercury removal effect but SO₂ will inhibit it on the other way. The mercury removal efficiency could reach about 90% with this modified type of activated carbon sprayed into flue gas under the conditions of SCR inlet temperature in the range of 351~370℃, flue gas temperature in the range of 191~210℃, SO₂ volume fraction of (293~602)×10^-6, NO volume fraction of (588~893)×10^-6, activated carbon injection quantity of 0.5 kg/h, reaction space velocity of 4 000 h^-1, and flue gas flow rate of 400~500 m³/h.

Key words: coal fired flue gas, injection demercuration, NH₄Br modification, rice husk-derived activated carbon, flue gas composition

中图分类号:

陶君, 谷小兵, 黄天放, 柳帅, 胡鹏, 董璐, 黄亚继, 段钰锋. 燃煤烟气组分对喷射稻壳活性炭脱汞的影响[J]. 中国电力, 2019, 52(10): 150-154,184.

TAO Jun, GU Xiaobing, HUANG Tianfang, LIU Shuai, HU Peng, DONG Lu, HUANG Yaji, DUAN Yufeng. Effect of Flue Gas Composition on Mercury Removal by Injecting Rice Husk-Derived Activated Carbon[J]. Electric Power, 2019, 52(10): 150-154,184.

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燃煤烟气组分对喷射稻壳活性炭脱汞的影响

Effect of Flue Gas Composition on Mercury Removal by Injecting Rice Husk-Derived Activated Carbon

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Effect of Flue Gas Composition on Mercury Removal by Injecting Rice Husk-Derived Activated Carbon

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