垃圾焚烧飞灰热处理过程中Zn的挥发机理研究

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Abstract

Under the condition of 650~1350℃, the effect of temperature and time on the volatilization rate of Zn in fly ash was investigated in this experiment. XAFs were used to analyze the morphological and structuralof Zn in fly ash and secondary fly ash. The chlorination reaction pathway of Zn was deduced by using Gibbs free energy theory and the verification test was carried out. The results showed that the temperature was the main factor affecting on the volatilization of Zn. The volatilization trend increased first with temperature and then decreased. The volatilization rate reached the highest at 1000℃, while the time had little effect on its volatilization. Zn was mainly volatilized in the form of chloride, according to the theoretical calculation and verification test of Gibbs free energy theory in each hypothetical reaction pathway, it was concluded that the chlorination reaction of Zn in the heat treatment was carried out in two steps. First, the chloride in the fly ash reacted with SiO₂ to form Cl₂, and then ZnO reacted with Cl₂ to form ZnCl₂, while a small part of Cl₂ may react with water vapor to form HCl, and then react with ZnO to form ZnCl₂.

Key words： municipal solid waste incineration fly ash Zn chlorination volatilization

Received: 31 July 2018

PACS:

X705

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	Articles by authors
	WANG Ye
	LI Na
	TIAN Shu-lei
	LI Song
	PING Ran
	LIU Hong-bo
	ZHOU Xiu-yan

Cite this article:

WANG Ye,LI Na,TIAN Shu-lei等. Volatilization mechanism of Zn on municipal solid waste incineration fly ash during thermal treatment[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(2): 706-712.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I2/706

[1]	Song J, Sun Y, Jin L. Pestel analysis of the development of the waste-to-energy incineration industry in China[J]. Renewable & Sustainable Energy Reviews, 2017,80:276-289.
[2]	Meawad A S, Bojinova D Y, Pelovski Y G. An overview of metals recovery from thermal power plant solid wastes[J]. Waste Management, 2010,30(12):2548-2559.
[3]	Zheng L, Song J, Li C,et al. Preferential policies promote municipal solid waste (MSW) to energy in China:Current status and prospects[J]. Renewable & Sustainable Energy Reviews, 2014,36(C):135-148.
[4]	GB16889-2008生活垃圾填埋场污染控制标准[S]. GB16889-2008 Standard for Pollution Control on the Landfill Site of Municipal Solid Waste[S].
[5]	王雷,金宜英,聂永丰,等.添加剂和水洗对焚烧飞灰烧结过程中重金属迁移特性的影响[J]. 环境科学, 2009,30(4):1232-1237. Wang lei, Jin yiying, Nie yongfeng, et al. Effect of additive and washing pre-treatment on heavy metal vaporization during sintering process of MSWI fly ash[J]. Chinese Journal of Environmental Science, 2009,30(4):1232-1237.
[6]	白晶晶,张增强,闫大海,等.水洗对焚烧飞灰中氯及重金属元素的脱除研究[J]. 环境工程, 2012,30(2):104-108. Bai jingjing, Zhang zengqiang, Yan dahai, et al. Study on the removal of chlorine and heavy metals in incineration fly ash during water-washing process[J]. Enviromental Engineering, 2012,30(2):104-108.
[7]	朱芬芬,高冈昌辉,大下和徹,等.焚烧飞灰预处理工艺及其无机氯盐的行为研究[J]. 环境科学, 2013,34(6):2473-2478. Zhu fenfen, Takaoka Masaki, Oshita Kazuyuki, et al. Pretreatment technology for fly ash from mswi and the corresponding study of chloride behavior[J]. Environmental Science, 2013,34(6):2473-2478.
[8]	胡小英,田书磊,闫大海,等.氯化剂对垃圾焚烧飞灰中重金属挥发特性的影响[J]. 中国环境科学, 2008,28(7):614-619. Hu xiaoying, Tian shulei, Yan dahai, et al. The effect of chlorination agents on the volatilization of heavy metals in fly ash from municipal solid wasteincinerator[J]. China Environmental Science, 2008,28(7):614-619.
[9]	Gong B, Deng Y, Yang Y, et al. Effects of microwave-assisted thermal treatment on the fate of heavy metals in MSWI fly ash[J]. Energy & Fuels, 2017,31(11).
[10]	Liu G, Jiang X, Wang M, et al. Comparison of PCDD/F levels and profiles in fly ash samples from multiple industrial thermal sources[J]. Chemosphere, 2015,133(1):68-74.
[11]	Chen W, Kirkelund G M, Jensen P E,et al. Comparison of different MSWI fly ash treatment processes on the thermal behavior of As, Cr, Pb and Zn in the ash[J]. Waste Management, 2017,24(27):21591-21600.
[12]	李润东,聂永丰,王雷,等.垃圾焚烧飞灰熔融过程重金属的迁移特性实验[J]. 中国环境科学, 2004,24(4):97-100. Li rundong, Nie yongfeng, Wang lei, et al. Migration characteristics experiment of heavy metal in the vitrification course of fly ash from municipal solidwaste incineration[J]. China Environmental Science, 2004,24(4):480-483.
[13]	冯军会,何品晶,章骅,等.二噁英类化合物在生活垃圾焚烧飞灰中的分布[J]. 中国环境科学, 2005,25(6):99-103. Feng junhui, He pinjing, Zhang hua, et al. Distribution of dioxins-like compounds in air pollution control residues from municipal solid waste incinerator[J]. China Environmental Science, 2005,25(6):99-103.
[14]	Ferone C, Colangelo F, Messina F, et al. Recycling of pre-washed municipal solid waste incinerator fly ash in the manufacturing of low temperature setting geopolymer materials[J]. Materials, 2013,6(8):3420.
[15]	Nowak B, Rocha S F, Aschenbrenner P, et al. Heavy metal removal from MSW fly ash by means of chlorination and thermal treatment:Influence of the chloride type[J]. Chemical Engineering Journal, 2012,179(4):178-185.
[16]	Jakob A, Stucki S, Kuhn P. Evaporation of heavy metals during the heat treatment of municipal solid waste incinerator fly ash[J]. Environmental Science & Technology, 1995,29(9):2429-2436.
[17]	田书磊.垃圾焚烧飞灰重金属热分离工艺及挥发特性研究[D]. 哈尔滨:哈尔滨工业大学, 2007. Tian shulei. Thermal-separation process and evaporation mechanism of heavy metal from mswi fly ash[D]. Harbin:Harbin Institute of Technology, 2007.
[18]	Chan C C, Kirk D W. Behaviour of metals under the conditions of roasting MSW incinerator fly ash with chlorinating agents[J]. Journal of Hazardous Materials, 1999,64(1):75-89.
[19]	Fujimori T, Tanino Y, Takaoka M. Coexistence of Cu, Fe, Pb, and Zn oxides and chlorides as a determinant of chlorinated aromatics generation in municipal solid waste incinerator fly ash[J]. Environmental Science & Technology, 2014,48(1):85.
[20]	Yu M, Tian S, Chu W,et al. Speciation of zinc in secondary fly ashes of municipal solid waste at high temperatures[J]. Journal of Synchrotron Radiation, 2009,16(4):528.
[21]	刘敬勇,孙水裕.焚烧飞灰高温过程中重金属的挥发及其氯转化特征[J]. 环境科学, 2012,33(9):3279-3287. Liu jingyong, Sun shuiyu. Chlorination transformation and volatilization of heavy metals in fly ash from the incineration during the disposal process with higher temperature[J]. Environmental Science, 2012,33(9):3279-3287.
[22]	Chan C, Jia C Q, Graydon J W, et al. The behaviour of selected heavy metals in MSW incineration electrostatic precipitator ash during roasting with chlorination agents[J]. Journal of Hazardous Materials, 1996,50(1):1-13.
[23]	Nowak B, Pessl A, Aschenbrenner P,et al. Heavy metal removal from municipal solid waste fly ash by chlorination and thermal treatment[J]. Journal of Hazardous Materials, 2010,179(1-3):323.
[24]	Zhang Y. Effect of chlorine on the vaporization behavior of zinc and lead during high temperature treatment of dust and fly ash[J]. Transactions of the Iron & Steel Institute of Japan, 2007,44(9):1457-1468.
[25]	Jie Y, Sun L, Ma C, et al. Mechanism on heavy metals vaporization from municipal solid waste fly ash by MgCl2·6H2O[J]. Waste Management, 2015,49:124-130.
[26]	Miwa M, Morita K. Chloride capacities of CaO-SiO2-Al2O3(-FeO, MgO, MnO) slags and their application in the incineration processes[J]. Isij International, 2002,42(10):1065-1070.
[27]	Morita K, Hirosumi T, Sano N. Effects of aluminum, silicon, and boron on the dissolution rate of nitrogen into molten iron[J]. Metallurgical & Materials Transactions B, 2000,31(5):899-904.
[28]	田书磊,王琪,王伟.复合添加剂对垃圾焚烧飞灰熔融固化处理的影响[J]. 环境卫生工程, 2009,17(3):1-3. Tian Shulei, Wang Qi, Wang Wei. Effect of compound additive on melting and solidification of fly ash from waste incinerator[J]. Environmental Sanitation Engineering, 2009,17(3):1-3.
[29]	Zhu F, Takaoka M, Shiota K, et al. Chloride chemical form in various types of fly ash[J]. Environmental Science & Technology, 2008, 42(11):3932-3937.
[30]	Cahn R W. Materials science:melting and the surface[J]. Nature, 1986,323(6090):668-669.
[31]	Yu J, Qiao Y, Jin L, et al. Removal of toxic and alkali/alkaline earth metals during co-thermal treatment of two types of MSWI fly ashes in China[J]. Waste Management, 2015,46:287.