CO2去除垃圾焚烧飞灰水洗液中Cu、Cr的工艺条件
Process conditions for Cu and Cr removal from water washing solution of municipal solid waste incinerator fly ash by CO2
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摘要: 以垃圾焚烧飞灰水洗液中的Cu和Cr为研究对象，采用通入CO2沉淀处理的方法，通过改变CO2的浓度、流速、通入时间、反应温度以及重金属离子初始浓度，对水洗液中的Cu和Cr的沉淀效果进行实验研究.结果表明，CO2能够很好地沉淀水洗液中的Ca2+，以及降低pH值；CO2的浓度越高，Cu和Cr的沉淀效果越好；CO2沉淀处理Cu和Cr的最佳工艺条件为：CO2浓度10%、通入时间80 s、流速2 mL·min-1和反应温度40 ℃，在此工艺条件下，水洗液中Cu和Cr的沉淀率分别达到95%和50%左右.Abstract: Taking Cu and Cr in the water washing solution of municipal solid waste incinerator (MSWI) fly ash as the research object, adopting the sedimentation method by blowing CO2, the effects of CO2 concentration, flow rate, blowing time, reaction temperature and heavy metal initial concentrations on the sedimentation of Cu and Cr in the water washing solution were studied. The results showed that CO2 could effectively precipitate Ca2+ and decrease the pH value of the water washing solution. Higher CO2 concentrations were beneficial to the sedimentation of Cu and Cr; The optimal process conditions of CO2 precipitation treatment were a CO2 concentration of 10%, a blowing time of 80 s, a flow rate of 2 mL·min-1and a reaction temperature of 40℃. Under these conditions, the sedimentation rates of Cu and Cr reached about 95% and 50%, respectively.
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Key words:
- MSWI fly ash /
- water washing solution /
- CO2 /
- sedimentation effect /
- Cu and Cr
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[1] 李娜,郝庆菊,江长胜,等.重庆市垃圾焚烧飞灰粒径分布及重金属形态分析[J].环境化学,2010,29(4):659-664. LI N, HAO Q J, JIANG C S, et al. Particle size distribution and speciation analysis of heavy metals in municipal solid waste incineration fly ash in Chongqing, China[J]. Environmental Chemistry,2010,29(4):659-664(in Chinese).
[2] 熊祖鸿,鲁敏,胡大为,等.广东省典型生活垃圾焚烧飞灰的物化及固化特性[J].环境化学,2014,33(7):1173-1179. XIONG Z H, LU M, HU D W, et al. Physicochemical and solidification characteristics of municipal solid wastes incineration (MSWI) fly ash from Guangdong Province[J]. Environmental Chemistry,2014,33(7):1173-1179(in Chinese).
[3] 胡艳军,孙铁.不同粒径垃圾焚烧飞灰中重金属富集特性表征[J].环境化学,2012,31(11):1717-1723. HU Y J, SUN T. Heavy metal enrichment in municipal solid waste incineration fly ash with various size ranges [J]. Environmental Chemistry, 2012,31(11):1717-1723(in Chinese).
[4] 何品晶,吴长淋,章骅,等.生活垃圾焚烧飞灰及其稳定化产物的长期浸出行为[J].环境化学,2008,27(6):786-790. HE P J, WU C L, ZHANG Y, et al. The long-term leaching behavior of air pollution control residues and its treatment products [J]. Environmental Chemistry, 2008,27(6):786-790 (in Chinese).
[5] 杨志军,倪余文,张智平,等..不同垃圾焚烧炉产生的PCDD/Fs和PCBs同类物的分布[J].环境化学,2005,24(1):63-67. YANG Z J, NI Y W, ZHANG Z P, et al. Patterns of PCDD/Fs and PCBs congeners formed from different types of municipal waste incinerators. [J]. Environmental Chemistry. 2005,24(1):63-67(in Chinese).
[6] 国家危险废物名录[S]. 中华人民共和国国务院公报, 2008,34:18-41. National Hazardous Wastes Catalogue[S].Bulletin of the State Council of the People's Republic of China,2008 ,34:18-41(in Chinese).
[7] 张玲,席北斗,李秀金,等. 水洗过程对垃圾焚烧飞灰浸出特性的影响[J].环境科学研究,2007,20(4):130-133. ZHANG L, XI B D, LI X J, et al. Effects of water-extraction process on leaching characteristics of municipal solid waste incineration fly ash[J]. Research of Environmental Sciences, 2007,20(4):130-133(in Chinese).
[8] QIAN G R, SHI J, CAO Y L, et al. Properties of MSW fly ash-calcium sulfoaluminate cement matrix and stabilization/solidification on heavy metals[J].Journal of Hazardous Materials, 2008, 152(1):196-203. [9] 李生钰. NSP窑预热器结皮堵塞的操作优化和配料调整[J].水泥工程,2012,(4):33-37. LI S Y. Operation provement and proportion adjusting for coating and blocking in NSP precalciner[J]. Cement Engineering,2012 ,(4):33-37(in Chinese).
[10] 邓德新.水泥预分解系统的结皮、积料和堵塞的原因及处理措施浅析[J].广西轻工业,2011,27(3):32-33 ,42. DENG D X. Analysis for causes and treatment measures of crust, buildup and blockage of cement precalciner system[J]. Guangxi Journal of Light Industry. 2011,27(3):32-33,42(in Chinese).
[11] 罗智宇,张云月,张清,等.垃圾焚烧飞灰水洗去氯的实验研究[J].环境卫生工程,2008,16(3):16-22. LUO Z Y, ZHANG Y Y, ZHANG Q, et al. Experimentation study on removal chlorine from incineration fly ash by washing process[J]. Environmental Sanitation Engineering, 2008, 16(3):16-22(in Chinese).
[12] [13] MULDER E. Pre-treatment of MSWI fly ash for useful application[J].Waste Management,1996,16(1-3):181-184. [14] DERIE R. A new way to stabilize fly ash from municipal incinerators[J].Waste Management,1996,16(8):711-716. [15] WANG K S, CHIANG K Y, LIN K L, et al. Effects of a water-extraction process on heavy metal behavior in municipal solid waste incinerator fly ash[J].Hydrometallurgy,2001,62:73-81. [16] CHIMENOS J M, FEMANDEZ A I, CERVANTES A, et al. Optimizing the APC residue washing process to minimize the release of chloride and heavy metals[J]. Waste Management, 2005, 25:686-693. [17] [18] PENILLA R P, BUSTOS A G, ELIZALDE S G. Immobilization of Cs, Cd, Pb and Cr by synthetic zeolites from Spanish low-calcium coal fly ash [J]. Fuel, 2006, 85(5): 823-832. [19] 蒋建国,赵振振,王军,等.焚烧飞灰水泥固化技术研究[J].环境科学学报,2006,26(2):230-235. JIANG J G, ZHAO Z Z, WANG J, et al. Study on cement solidification technology in treating with fly ash[J]. Acta Scientiae Circumstantiae,2006,26(2):230-235(in Chinese).
[20] 郭燕妮,方增坤,胡杰华,等.化学沉淀法处理含重金属废水的研究进展[J].工业水处理,2011,31(12):9-13. GUO Y N, FANG Z K, HU J H, et al. Research development of treating wastewater containing heavy metals by chemical precipitation process[J]. Industrial Water Treatment, 2011,31(12):9-13(in Chinese).
[21] 凌永生,金宜英,王雷,等.苏州市生活垃圾焚烧飞灰水泥窑煅烧资源化示范工程[J].环境工程,2008,26(S1):220-223. LIN Y S, JIN Y Y, WANG L, et al. A demonstration project of treating fly ash from domestic refuse incineration in Suzhou by cesrcent kiln calcine[J]. Environmental Engineering,2008,26(S1):220-223(in Chinese).
[22] ZACHARA J M, COWAN C E, RESCH C T. Sorption of divalent metals on calcite[J]. Geochimica et Cosmochimica Acta, 1991, 55(6):1549-1562. [23] 蔡慧林,汪正军.碳酸钙改性硅藻土的制备及其吸附性能研究[J].广州化工,2011,39(17):43-46. CAI H L, WANG Z J. The preparation of calcium carbonate modified diatomite and absorption properties[J]. Guangzhou Chemical Industry, 2011,39(17):43-46(in Chinese).
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