蛭石复合添加剂对准东煤灰特性影响

doi:10.16085/j.issn.1000-6613.2016-2076

化工进展 ›› 2017, Vol. 36 ›› Issue (09): 3280-3286.DOI: 10.16085/j.issn.1000-6613.2016-2076

蛭石复合添加剂对准东煤灰特性影响

高姗姗, 金晶, 刘敦禹, 王永贞, 姚宇翔, 寇学森

上海理工大学能源与动力工程学院, 上海 200093

收稿日期:2016-07-15 修回日期:2017-03-01 出版日期:2017-09-05 发布日期:2017-09-05
通讯作者: 金晶,教授,从事清洁燃烧方面的研究。
作者简介:高姗姗(1992-),女,硕士研究生,从事清洁燃烧技术方面的研究。E-mail:shanny_gss@163.com
基金资助:
国家"十二五"科技支撑计划（2015BA04B03）及上海理工大学准东煤高效利用协同创新平台项目。

Effect of vermiculite composite additives on the anti-slagging behavior during combustion of Zhundong coal

GAO Shanshan, JIN Jing, LIU Dunyu, WANG Yongzhen, YAO Yuxiang, KOU Xuesen

School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai 200093, Chian

Received:2016-07-15 Revised:2017-03-01 Online:2017-09-05 Published:2017-09-05

摘要/Abstract

摘要： 采用高温热台显微镜和X射线衍射分析（XRD）相结合的方法，研究了蛭石复合添加剂对准东煤灰膨胀特性以及准东煤灰内矿物组分随温度的演变规律，分析了蛭石复合添加剂对准东煤结渣特性的影响。结果表明，蛭石复合添加剂可改变准东煤灰的膨胀率，使得灰渣变得疏松多孔且质地较脆，极易自然脱落或通过吹灰方式除去，蛭石复合添加剂添加量越大，煤灰膨胀率越高；蛭石复合添加剂对准东煤灰软化温度的影响较小，添加量小于5%时软化温度基本不变，继续增加添加量后煤灰软化温度将明显降低，建议采用5%的添加量；高温下准东煤灰中主要以钙铝黄长石、镁黄长石和黄长石为主，随着加热时间增加钙铝黄长石及镁黄长石向灰熔点较高的黄长石转化，而加入蛭石复合添加剂后高温下部分钙铝黄长石及镁黄长石会向灰熔点相对较低的透辉石转变。

关键词: 准东煤, 蛭石复合添加剂, 灰成分, 熔融特性, 膨胀特性

Abstract: The ash expansion characteristic and mineral conversion of Zhundong coal(ZDC)ash with different amounts of vermiculite injection were studied by using heating microscope and XRD. The results showed that the vermiculite composite additive could improve the expansion characteristic of ZDC ash. The more vermiculite compound additives,the higher the swelling rate of coal ash. The deposits with vermiculite composite additive were more friable and polyporous so that it could be removed by soot blower or fall off easily. The ash softening temperature of ZDC with vermiculite composite additive change slightly,almost having no change by blending ratio of 5%. And the ash softening temperature would decreases obviously when increasing the blending ratios of additive continually. Thus,the blending ratio of 5% was most appropriate. The main minerals in ZDC ash included gehlenite,akermanite and melilite when heating at higher temperature. However,melilite became the main mineral with longer heating time. After adding the vermiculite composite additive,the gehlenite and akermanite were transformed into diopside with lower ash fusion temperature at high temperature.

Key words: Zhundong coal (ZDC), vermiculite composite additive, ash composition, ash fusion characteristic, expansion characteristic

中图分类号:

TQ535

高姗姗, 金晶, 刘敦禹, 王永贞, 姚宇翔, 寇学森. 蛭石复合添加剂对准东煤灰特性影响[J]. 化工进展, 2017, 36(09): 3280-3286.

GAO Shanshan, JIN Jing, LIU Dunyu, WANG Yongzhen, YAO Yuxiang, KOU Xuesen. Effect of vermiculite composite additives on the anti-slagging behavior during combustion of Zhundong coal[J]. Chemical Industry and Engineering Progress, 2017, 36(09): 3280-3286.

参考文献

[1] 严陆光,夏训诚,吕绍勤,等. 大力推进新疆大规模综合能源基地的发展[J]. 电工电能新技术,2011,30(2):1-4. YAN L G,XIA X C,LV S Q,et al. Great promotion of development of large scale integrative energy base in Xinjiang[J]. Advanced Technology of Electrical Engineering and Energy,2011,30(2):1-4.
[2] DAI S F,REN D Y,CHOU C L,et al. Geochemistry of trace elements in Chinese coals:a review of abundances,genetic types, impacts on human health,and industrial utilization[J]. International Journal of Coal Grology,2012,94(s1):3-21.
[3] 董明钢. 高钠煤对锅炉受热面结渣、沾污和腐蚀的影响及预防措施[J]. 热力发电,2008(9):35-39. DONG M G. Influence of high-sodium coal upon slagging,contamination,and corrosion on the heating surface of boilers[J]. Thermal Power Generation,2008(9):35-39.
[4] 沈铭科,邱坤赞,黄振宇,等. 准东煤掺烧高岭土对固钠率及灰熔融特性影响研究[J]. 燃料化学学报,2015(9):1044-1051. SHEN M K,QIU K Z,HUANG Z Y,et al. Influence of kaolin on sodium retention and fusion characteristic during combustion of Zhundong coal[J]. Journal of Fuel Chemistry and Technology,2015(9):1044-1051.
[5] 王学斌,魏博,张利孟,等. 温度和SiO₂添加物对准东煤中碱金属的赋存形态及迁徙特性的影响[J]. 热力发电,2014,43(8), 84-88. WANG X B,WEI B, ZHANG L M,et al. Effect of temperature and silicon additives on occurrence and transformation characteristics of alkali metal in Zhundong coal[J]. Thermal Power Generation,2014,43(8),84-88.
[6] YAO Y X,JIN J,LIU D Y,et al. Evaluation of vermiculite in reducing ash deposition during the combustion of high-calcium and high-sodium Zhundong coal in a drop-tube furnace[J]. Energy & Fuels,2016,30(4):3488-3494.
[7] 耿曼,石林,徐稳定,等. 蛭石作为燃煤固硫添加剂的实验研究[J].非金属矿,2006(4):28-30. GENG M,SHI L,XU W D,et al. Experimental research on using vermiculite as coal-burning sulfur-fixed additive[J]. Non-Metallic Mines,2006(4):28-30.
[8] AL-OTOOM A Y,W,ELLBRYANT G IOTT B J,et al. Experimental options for determining the temperature for the onset of sintering of coal ash[J]. Energy & Fuels,2000,14(1):227-233.
[9] AL-OTOOM A Y,ELLIOTT B J,WALL T F,et al. Measurement of the sintering kinetics of coal ash[J]. Energy & Fuels,2000,14(5):994-1001.
[10] 崔国文. 缺陷、扩散与烧结[M]. 北京:清华大学出版社,1990. CUI G W. Defect,diffusion and sinter[M]. Beijing:Tsinghua University Press,1990.
[11] ILIC M,CHEESEMAN C,SOLLARS C,et al. Mineralogy and microstructure of sintered lignite coal fly ash[J]. Fuel,2003,82(3):331-6.
[12] LIN K L,CHIANG K Y,LIN D F. Effect of heating temperature on the sintering characteristics of sewage sludge ash[J]. Hazard Mater,2006,128(2/3):175-181.
[13] PALCHIK V,HATZOR Y H. The influence of porosity on tensile and compressive strength of porous chalks[J]. Rock Mech. Rock Eng.,2004,37(4):331-41.
[14] WACHTMAN J B,CANNON W R,MATTHEWSON M J. Mechanical properties of ceramics[M]. New York:Wiley,1996.
[15] 岑可法,周昊,池作和,等. 大型电站锅炉安全及优化运行技术[M].北京:中国电力出版社,2003. CEN K F,ZHOU H,CHI Z H,et al.Utility boiler safety and optimization technology[M]. Beijing:China Electric Power Press,2003:571-589.
[16] 李帆,邱建荣,郑楚光,等. 混煤煤灰熔融特性及矿物形态的研究[J]. 工程热物理学报,1998,19(1):112-116. LI F,QIU J R,ZHENG C G,et al. The fusion characteristics and mineral species of blended coal ash[J]. Journal of Engineering Thermophysics,1998,19(1):112-116.
[17] 李帆,邱建荣,郑楚光,等. 混煤煤灰在加热过程中矿物质行为研究[J]. 燃料化学学报,1997,25(5):400-403. LI F,QIU J R,ZHENG C G,et al. Study on behavior of minerals in blended coal ash during heating process[J]. Journal of Fuel Chemistry and Technology,1997,25(5):400-403.
[18] 贾明生,张乾熙. 影响煤灰熔融性温度的控制因素[J]. 煤化工,2007(3):1-5. JIA M S,ZHANG Q X. Key factor and affecting fusion temperature of coal ash[J]. Coal Chemical Industry,2007(3):1-5.
[19] Reifenstein A P,Kahraman H,Coin C,et al. Behaviour of selected minerals in an improved ash fusion test:quartz,potassium feldspar,sodium feldspar,kaolinite,illite,calcite,dolomite,siderite,pyrite and apatite[J]. Fuel,1999,78(12):1449-1461.
[20] 张利孟,董信光,刘科,等. 高岭土对准东煤结渣特性及矿物质演变的影响[J]. 燃料化学学报,2015,10(43):1176-1181. ZHANG L M,DONG X G,LIU K,et al. Effect of kaolin on ash slagging and mineral conversion of Zhundong coal[J]. Journal of Fuel Chemistry and Technology,2015,10(43):1176-1181.
[21] Dahlin R S,Dorminey J R,Peng W W,et al. Preventing ash agglomeration during gasification of high-sodium lignite[J]. Energy Fuels,2008,23(2):785-793.

蛭石复合添加剂对准东煤灰特性影响

Effect of vermiculite composite additives on the anti-slagging behavior during combustion of Zhundong coal

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