凹凸棒黏土对燃煤PM<sub>2.5</sub>排放及团聚捕集特性影响

陈惠超; 吴玮; 梁财

凹凸棒黏土对燃煤PM_2.5排放及团聚捕集特性影响

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

基金项目: 国家重点基础研究发展规划(973计划, 2013CB228505)。

详细信息

通讯作者:
陈惠超, Tel/Fax: 025-83790147, E-mail: hcchen@seu.edu.cn。

中图分类号: TK16
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- 被引次数: 0
出版历程
- 收稿日期: 2014-10-15
- 修回日期: 2014-12-09
- 刊出日期: 2015-02-28

Effect of attapulgite on PM_2.5 emission and agglomeration during coal combustion

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

摘要

摘要: 在固定床反应系统上考察凹凸棒黏土对燃煤可吸入颗粒物PM_2.5的排放及团聚捕集特性影响,分析凹凸棒黏土添加量以及添加凹凸棒黏土情况下燃烧气氛、燃烧温度和钙硫物质的量比等参数对燃煤PM_2.5的数量浓度、质量浓度以及团聚捕集率的影响规律。结果表明,煤燃烧过程中添加凹凸棒黏土可以显著降低PM_2.5排放浓度,凹凸棒黏土的添加量不宜超过3%(质量分数);空气气氛下燃烧产生的PM_2.5多于O₂/CO₂气氛;随着钙硫物质的量比的增大,PM₁的质量浓度减小,但PM_1~2.5的质量浓度增大,颗粒物的粒径有向更大粒径转移的趋势;燃烧温度的升高会促进PM_2.5各粒径范围颗粒物的生成,降低了凹凸棒黏土对PM_2.5团聚捕集率。
- 凹凸棒黏土 /
- PM_2.5 /
- 颗粒团聚
Abstract: Effect of attapulgite on PM_2.5 emissions and agglomeration during coal combustion was investigated in a fixed bed system. The effects of addition amount, combustion temperature, mole ratio of calcium to sulfate and combustion atmosphere on mass and number concentration and collection efficiency of PM_2.5 were analyzed. The results show that attapulgite added during coal combustion can effectively reduce PM_2.5 emissions. The suitable amount of attapulgite is no more than 3%. PM_2.5 emission during coal combustion in air is higher than that in O₂/CO₂ atmosphere. PM₁ mass concentration decreases with increasing mole ratio of calcium to sulfate, while PM_1~2.5 mass concentration increases, indicating an increasing trend in particle size. Increasing combustion temperature will increase PM_2.5 emission and reduce its collection.
- attapulgite /
- PM_2.5 /
- particle agglomeration

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参考文献(15)

吕建燚, 李定凯. 不同条件对煤粉燃烧后PM₁₀、PM_2.5、PM₁排放影响的实验研究[J]. 中国电机工程学报, 2006, 26(20): 103-107. (LV Jian-yi, LI Ding-kai. Experimental study on PM₁₀, PM_2.5, PM₁ emission features influenced by different conditions in pulverized coal combustion[J]. Chin Soc Electr Eng, 2006, 26(20): 103-107.)

STRAND M, PAGELS J, SZPILA A, GUDMUNDSSON A, SWIETLICKI E, BOHGARD M, SANATI M. Fly ash penetration through electrostatic precipitator and flue gas condenser in a 6 MW biomass fired boiler[J]. Energy Fuels, 2002, 16(6): 1499-1506.

岳勇, 陈雷, 姚强, 李水清. 燃煤锅炉颗粒物粒径分布和痕量元素富集特性实验研究[J]. 中国电机工程学报, 2005, 25(18): 74-79. (YUE Yong, CHEN lei, CAO Qiang, LI Shui-qing. Experimental study on characteristics of particulate matter size distribution and trace elements enrichment in emissions from a pulverized coal-fired boiler[J]. Chin Soc Electr Eng, 2005, 25(18): 74-79.)

SENIOR C L, BOOL L E, SRINIVASACHAR S, PEASEB B R, PORLE K. Pilot scale study of trace element vaporization and condensation during combustion of a pulverrized sub-bituminous coal[J]. Fuel Process Technol, 2000, 63(2/3): 149-165.

SONDREAL E A, BENSON S A, PAVLISH J H, NICHOLAS V C R. An overview of air quality: Mercury, trace elements, and particulate matter[J]. Fuel Process Technol, 2004, 85(6/7): 425-440.

魏凤, 张军营, 王春梅, 郑楚光. 煤燃烧超细颗粒物团聚促进技术的研究进展[J]. 煤炭转化, 2004, 26(3): 27-31. (WEI Feng, ZHANG Jun-ying, WANG Chun-mei, ZHENG Chu-guang. Review of submicron particles agglomeration in coal combustion process[J]. Coal Convers, 2004, 26(3): 27-31.)

徐鸿, 骆仲泱, 王鹏, 王涛, 高翔, 岑可法. 石灰石对煤燃烧产生颗粒物及重金属影响实验研究[J]. 工程热物理学报, 2004, 25(5): 871-874. (XU Hong, LUO Zhong-yang, WANG Peng, WANG Tao, GAO Xiang, CEN Ke-fa. Experimental research of limestone effect on particulates and heavy metals emitted from coal combustion[J]. J Eng Thermophysics, 2004, 25(5): 871-874.)

TAKUWA T, NARUSE I. Emission control of sodium compounds and their formation mechanisms during coal combustion[J]. Proc Combust Inst, 2007, 31(2): 2863-2870.

屈成瑞, 赵长遂, 段伦博, 周骛. O₂ /CO₂ 气氛添加高岭石对燃煤PM_{2. 5}排放的影响[J]. 燃料化学学报, 2010, 38(4): 398-402. (QU Cheng-rui, ZHAO Chang-sui, DUAN Lun-bo, ZHOU Wu. Effect of kaolinite additive on formation of PM_2.5under O₂ /CO₂ atmosphere during coal combustion[J]. J Fuel Chem Technol, 2010, 38(4): 398-402.)

BRADLEY W F. The structure scheme of attapulgite[J]. Am Mineral, 1940, 25: 405-410.

张玉. 凹凸棒粘土及其在印染行业中的应用. 上海: 东华大学硕士学位论文, 2013. (ZHANG Yu. Application of the attapulgite clay in dyeing and finishing industry. Shanghai: Donghua University, 2013.)

HEIDENREICH S, EBERT F. Condensational droplet growth as a preconditioning technique for the separation of submicron particles from gases[J]. Chem Eng Process, 1995, 34(3): 235-244.

HEIDENREICH S, VOGT U, BVTTNER H, EBERT F. A novel process to separate submicron particles from gases-a cascade of packed columns[J]. Chem Eng Sci, 2000, 55(15): 2895-2905.

屈成锐. O₂/CO₂气氛下CFB燃煤PM2.5形成机理及其控制的研究. 南京: 东南大学, 2010. (QU Cheng-rui. Investigation on formation mechanisms and control of PM2.5 under O₂/CO₂ atmosphere during coal combustion in the CFB. Nanjing: Southeast University, 2010.)

屈成锐, 徐斌, 王学涛, 刘建新. O₂/CO₂气氛燃烧温度对燃煤PM_2.5形成的影响[J]. 燃料科学与技术, 2012, 18(5): 410-414. (QU Cheng-rui, XU Bin, WANG Xue-tao, LIU Jian-xin. Effect of combustion temperature on formation of PM_2.5under O₂/CO₂ atmosphere during coal combustion[J]. J Combust Sci Technol, 2012, 18(5): 410-414.)

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