-
摘要: 对玉米秸分别与两种煤以不同比例混烧生成的混烧灰进行了荷电特性研究。利用法拉第杯荷电量检测系统和静电低压撞击器(ELPI)测量了混烧灰的总体荷质比及分级荷质比,并借助于成分分析及形貌分析结果讨论了其影响机理。结果表明,随着生物质掺入量在混烧燃料中的增加,混烧灰的成分组成发生变化,使得其介电常数变大,比电阻增大,表面吸附能力增强,从而使混烧灰的总体荷质比有一定的上升趋势。对混烧灰的分级荷质比测量结果表明,排除灰样粒径的影响,生物质的掺入使得混烧灰的荷电能力得以增强,但影响相对较小,颗粒粒径是影响混烧灰荷电能力的主要因素。Abstract: The charge performance of ash generated from co-combustion of different types of coals and biomass fuel (corn stalk) was studied using faraday-cup detector and electrical low pressure impactor (ELPI). The results show that the charge capacity of co-combustion ash rises a little with the increase of biomass in fuel mixture. The reason is that different types of co-combustion ash have different chemical compositions and structural features. This improves the relative dielectric constant, specific resistance and surface adsorptive ability, and thus promotes the charge performance of co-combustion ash. Although the addition of biomass in fuel mixture raises the charge capacity of co-combustion ash, particle size is still the main influence factor on its charge performance.
-
Key words:
- biomass /
- co-combustion ash /
- charge-mass ratio /
- charge performance
-
图 1 粉尘总体荷质比测量系统原理示意图
Figure 1 Schematic diagram of total ash charge-to-mass ratio measurement system
图 2 电晕放电器原理示意图
Figure 2 Schematic diagram of charger
1: from charger BNC connector to charger needle; 2: from trap BNC connector to trap ring; 3: from charger frame to ground ring
图 3 粉尘分级荷质比测量系统原理示意图
Figure 3 Schematic diagram of classified ash charge-to-mass ratio measurement system
图 4 玉米秸灰荷电特性曲线ELPI记录图
Figure 4 ELPI registrogram of corn stalk ash charge characterization
图 5 玉米秸混烧灰总体荷质比与混烧比例关系
Figure 5 Relationship between biomass mixture ratio and charge-to-mass ratio of ash from corn stalk co-combustion
图 6 不同粒级玉米秸与无烟煤混烧灰荷质比
Figure 6 Charge-to-mass ratio of ash from co-combustion of corn stalk and anthracite
图 7 不同粒级玉米秸与烟煤混烧灰荷质比
Figure 7 Charge-to-mass ratio of ash from corn stalk and bituminous coal co-combustion
图 8 常温下玉米秸与烟煤混烧灰比电阻与混烧比例关系
Figure 8 Relationship between biomass mixture ratio and resistivity of ash from corn stalk and bituminous coal co-combustion
图 10 玉米秸占10%混烧灰微观形貌照片
Figure 10 SEM morphology images of ash from combustion of bituminous coal blends with 10% corn stalk
图 11 玉米秸占20%混烧灰微观形貌照片
Figure 11 SEM morphology images of ash from combustion of bituminous coal blends with 20% corn stalk
表 1 选用燃料的发热量
Table 1 Heat quantity of selected fuels
Fuels Anthracite Bituminous coal Corn stalk Heat quantity/(MJ·kg-1) 28.65 20.78 14.53 
下载: 导出CSV
表 2 玉米秸烟煤混烧灰样成分含量
Table 2 Component content of combustion ash from corn stalk and bituminous coal
Sample Content w/% K2O Na2O Al2O3 Fe2O3 CaO MgO SiO2 TiO2 K+Na+Fe+Ca+Mg Coal ash 0.91 0.35 27.04 8.09 2.66 0.40 57.70 1.25 12.41 5%biomass 1.36 0.59 26.05 7.82 3.01 0.66 56.28 1.20 13.44 10% biomass 1.74 1.09 26.73 7.55 3.21 0.81 55.79 1.21 14.40 15% biomass 1.93 1.07 25.85 7.27 3.36 1.12 56.14 1.09 14.75 20% biomass 2.13 0.88 25.60 7.00 3.71 1.35 56.50 0.99 15.07 100% biomass 4.40 1.29 6.20 2.80 7.59 8.45 48.99 0.22 24.53
下载: 导出CSV
-
[1] 史立山. 中国能源现状分析和可再生能源发展规划[J]. 可再生能源, 2004, (5). (SHI Li-shan. Analysis of present energy condition and renewable energy development plan in China[J]. Renew Energy, 2004, (5). http://www.cnki.com.cn/Article/CJFDTOTAL-NCNY200405000.htm [2] 张建良, 李净, 胡正文, 殷上轶, 左海滨, 苏步新. 生物质与无烟煤混合燃烧行为的热重分析[J]. 太阳能学报, 2013, 34(10): 1847-1852. http://www.cnki.com.cn/Article/CJFDTOTAL-TYLX201310030.htmZHANG Jian-liang, LI Jing, HU Zheng-wen, YIN Shang-yi, ZUO Hai-bing, SU Bu-xing. Thermogravimetric analysis of co-combustion behaviors of biomass and anthracite[J]. Acta Energ Sol Sin, 2013, 34(10): 1847-1852. http://www.cnki.com.cn/Article/CJFDTOTAL-TYLX201310030.htm [3] 胡亚范, 马予芳, 张永贵. 生物质能及其利用技术[J]. 节能技术, 2007, 25(4): 344-347.HU Ya-fan, MA Yu-fang, ZHANG Yong-gui. Biomass energy and its application technology[J]. Energy Conserv Technol, 2007, 25(4): 344-347. [4] HARDING N S, ADAMS B R. Biomass as reburning fuel a specialized cofiring application[J]. Biomass Bioenergy, 2000, (19): 429-445. http://www.ingentaconnect.com/content/els/09619534/2000/00000019/00000006/art00054 [5] 田宜水, 赵立欣, 孟海波, 袁艳文. 生物质-煤混合燃烧技术的进展研究[J]. 水利电力机械, 2006, 28(12): 87-91. http://www.cnki.com.cn/Article/CJFDTOTAL-SLDL200612020.htmTIAN Yi-shui, ZHAO Li-xin, MENG Hai-bo, YUAN Yan-wen. Research on co-firing of biomass and coal[J]. Water Conserv Elect Power Mach, 2006, 28(12): 87-91. http://www.cnki.com.cn/Article/CJFDTOTAL-SLDL200612020.htm [6] SAHU S G, CHAKRABORTY N, SARKAR P. Coal-biomass co-combustion: An overview[J]. Renewable Sustainable Energy Rev, 2014, 11(39): 575-586. [7] TAMURA M, WATANABE S, KOTAKE N, HASEGAWA M. Grinding and combustion characteristics of woody biomass for co-firing with coal in pulverised coal boilers[J]. Fuel, 2014, 134(15): 544-553. https://www.researchgate.net/publication/275168213_Grinding_and_combustion_characteristics_of_woody_biomass_for_co-firing_with_coal_in_pulverised_coal_boilers [8] 张肖肖, 杨冬, 张林华. 生物质与煤混烧燃烧特性研究进展[J]. 节能技术, 2011, 29(6): 483-485. http://www.cnki.com.cn/Article/CJFDTOTAL-MTZH201001014.htmZHANG Xiao-xiao, YANG Dong, ZHANG Lin-hua. Research status on combustion characteristics of co-firing of biomass and coal[J]. Energy Conserv Technol, 2011, 29(6): 483-485. http://www.cnki.com.cn/Article/CJFDTOTAL-MTZH201001014.htm [9] 蔡丽红, 原永涛, 吕建燚. 生物质与煤混烧灰的比电阻特性实验研究[J]. 燃料化学学报, 2011, 39(10): 741-745. http://rlhxxb.sxicc.ac.cn/CN/volumn/volumn_1263.shtml#CAI Li-hong, YUAN Yong-tao, LU Jian-yi. Specific resistance characteristics of ash from co-combustion of biomass and coal[J]. J Fuel Chem Technol, 2011, 39(10): 741-745. http://rlhxxb.sxicc.ac.cn/CN/volumn/volumn_1263.shtml# [10] 王金星, 李超, 刘慧敏, 黄江城, 王春波. 烟煤/生物质混燃特性实验研究[J]. 电力科学与工程, 2012, 28(2): 56-59. http://www.cnki.com.cn/Article/CJFDTOTAL-DLQB201202012.htmWANG Jin-xing, LI Chao, LIU Hui-min, HUANG Jiang-cheng, WANG Chun-bo. Experimental study on combustion charateristics of bitumite/biomass blends[J]. Elect Power Sci Eng, 2012, 28(2): 56-59. http://www.cnki.com.cn/Article/CJFDTOTAL-DLQB201202012.htm [11] 陈桂文, 肖登明. 电除尘器除尘效率影响因素及应对措施[J]. 电力环境保护, 2007, 23(6): 7-9. http://www.cnki.com.cn/Article/CJFDTOTAL-DLHB200706002.htmCHEN Gui-wen, XIAO Deng-ming. Influencing factors and improvement measures of ESP dust removal efficiency[J]. Elect Power Environ Prot, 2007, 23(6): 7-9. http://www.cnki.com.cn/Article/CJFDTOTAL-DLHB200706002.htm [12] 齐立强, 原永涛, 阎维平. 燃煤高铝飞灰在电除尘器中行为的试验研究[J]. 中国电机工程学报, 2005, 25(17): 105-109. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGDC200517021.htmQI Li-qiang, YUAN Yong-tao, YAN Wei-ping. Experimental study on the behavior of the high-alumina fly ash in electrostatic precipitators[J]. Proc CSEE, 2005, 25(17): 105-109. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGDC200517021.htm [13] GB/T212-2008, 煤的工业分析方法[S]. 2008. (GB/T212-2008, Proximate analysis of coal[S]. 2008. http://www.wenkuxiazai.com/doc/2f3d642a0066f5335a8121ef-2.html [14] E1755-01(2007), Standard test method for ash in biomass[S]. 2007. http://www.astm.org/DATABASE.CART/HISTORICAL/E1755-01R07.htm [15] 刘伟军, 陈拴柱, 张书华. 粉体荷电研究进展与煤粉荷电研究初探[J].节能, 2007, (8): 10-13. http://www.cnki.com.cn/Article/CJFDTOTAL-JNJN200708004.htmLIU Wei-jun, CHEN Shuan-zhu, ZHANG Shu-hua. A review and elementary discussion of powder and pulverized-coal charge[J]. Energy Conserv, 2007, (8): 10-13. http://www.cnki.com.cn/Article/CJFDTOTAL-JNJN200708004.htm [16] 张宝峰, 张连洪, 李双义. 颗粒人工荷电带电量测量的研究[J]. 天津大学学报, 2002, 35(6): 696-698. http://www.cnki.com.cn/Article/CJFDTOTAL-TJDX200206005.htmZHANG Bao-feng, ZHANG Lian-hong, LI Shuang-yi. Investigation on the measurement of artificial electric charge[J]. J Tianjin Univ, 2002, 35(6): 696-698. http://www.cnki.com.cn/Article/CJFDTOTAL-TJDX200206005.htm [17] 曾育锋, 程倍珊. 自制法拉第杯测微小颗粒电荷量[J]. 实验技术与管理, 2013, 30(4): 55-57. http://www.cnki.com.cn/Article/CJFDTOTAL-SYJL201304017.htmZENG Yu-feng, CHENG Bei-shan. Measuring eectric charge of small particle by home-made faraday-cup[J]. Exp Technol Manage, 2013, 30(4): 55-57. http://www.cnki.com.cn/Article/CJFDTOTAL-SYJL201304017.htm [18] 龙正伟, 姚强, 黄斌, 宋蔷. 用ELPI测量颗粒物的分级荷电量[J]. 工程热物理学报, 2006, 27(2): 354-356. http://www.cnki.com.cn/Article/CJFDTOTAL-GCRB200602055.htmLONG Zheng-Wei, YAO Qiang, HUANG Bin, SONG Qiang. Measurment of the particle's charge distribution using the electrical low-pressure impactor(ELPI)[J]. J Eng Thermophys, 2006, 27(2): 354-356. http://www.cnki.com.cn/Article/CJFDTOTAL-GCRB200602055.htm [19] HELD A, ZERRATH A, MCKEON U, FEHRENBACH T, NIESSNER R, PLASS-DULMER C, KAMINSKI U, BERRESHEIM H, POSCHL U. Aerosol size distributions measured in urban, rural and high-alpine air with an electrical low pressure impactor (ELPI)[J]. Atmos Environ, 2008, 42(36): 8502-8512. doi: 10.1016/j.atmosenv.2008.06.015 [20] 唐敏康, 冯国俊. 粉尘比电阻影响因素分析及应对措施[J]. 江西理工大学学报, 2007, 28(3): 44-46. http://www.cnki.com.cn/Article/CJFDTOTAL-NFYX200703012.htmTANG Min-kang, FENG Guo-jun. The analysis on affecting factors of dust ratio resistance and their responding measures[J]. J Jiangxi Univ Sci Technol, 2007, 28(3): 44-46. http://www.cnki.com.cn/Article/CJFDTOTAL-NFYX200703012.htm [21] 杨长河, 李劲, 刘宗辉. 高占空比颗粒电场荷电的计算[J]. 华中科技大学学报(自然科学版), 2006, 34(1): 53-56. http://www.cnki.com.cn/Article/CJFDTOTAL-HZLG200601016.htmZHANG Chang-he, LI Jing, LIU Zong-hui. Calculation of electrical charge for fraction particles with high volume[J]. J Huazhong Univ Sci Technol (Nat Sci Ed), 2006, 34(1): 53-56. http://www.cnki.com.cn/Article/CJFDTOTAL-HZLG200601016.htm [22] 刘海玉, 景博, 樊保国, 金燕. 低频下飞灰中金属氧化物介电特性研究[J]. 工程热物理学报, 2014, 35(4): 801-805. http://www.cnki.com.cn/Article/CJFDTOTAL-GCRB201404041.htmLIU Hai-yu, JING Bo, FAN Bao-guo, JIN Yan. Research on dielectric property of the metal oxides on fly ash at low frequency[J]. J Eng Thermophys, 2014, 35(4): 801-805. http://www.cnki.com.cn/Article/CJFDTOTAL-GCRB201404041.htm -
点击查看大图
计量
- 文章访问数: 75
- HTML全文浏览量: 24
- PDF下载量: 10
- 被引次数: 0
