粉煤灰对污泥焚烧灰活性影响的研究
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摘要
为了使城市污泥达到资源化利用的目的,以城市污泥和粉煤灰为原料,按粉煤灰的质量分别占样品总质量的0%、10%、20%、30%和40%进行混合、搅拌.自然风干之后,将其放在800℃下进行烧结,并对其快速冷却后的试样的物相、胶砂试块强度和显微结构进行了研究.经过研究发现,在一定程度的碾磨中没有粉煤灰的污泥焚烧灰不具有高活性.然而,随着粉煤灰掺量的增加,污泥焚烧灰的活性呈现先增加然后减少的趋势,并且可以确定粉煤灰的掺量为20%时,污泥焚烧灰的活性达到最佳,即其力学性能最优.
In order to achieve the purpose of resource utilization of municipal sludge,this paper takes municipal sludge and fly ash as raw materials,and mixes them according to the quality of fly ash,which accounts for 0%,10%,20%,30% and 40% of the total mass of the sample,respectively.After natural air drying,the samples were sintered at 800 degree C.The phase,strength and microstructure of the rapidly cooled samples were studied.It is found that sludge incineration ash without fly ash is not highly active in a certain degree of grinding.However,with the increase of fly ash content,the activity of sludge incineration ash increases first and then decreases.It can be determined that when the fly ash content is 20%,the activity of sludge incineration ash reaches the best,that is,its mechanical properties are the best.
In order to achieve the purpose of resource utilization of municipal sludge,this paper takes municipal sludge and fly ash as raw materials,and mixes them according to the quality of fly ash,which accounts for 0%,10%,20%,30% and 40% of the total mass of the sample,respectively.After natural air drying,the samples were sintered at 800 degree C.The phase,strength and microstructure of the rapidly cooled samples were studied.It is found that sludge incineration ash without fly ash is not highly active in a certain degree of grinding.However,with the increase of fly ash content,the activity of sludge incineration ash increases first and then decreases.It can be determined that when the fly ash content is 20%,the activity of sludge incineration ash reaches the best,that is,its mechanical properties are the best.
引文
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[4]Kim E H,Cho J K,Yim S.Digested sewage sludge solidification by converter slag for landfill cover[J].Chemosphere,2005,59(3):0～395
[5]Singh R P,Agrawal M.Potential benefits and risks of land application of sewage sludge[J].Waste Management,2008,28(2):347～358
[6]Werther J,Ogada T.Sewage sludge combustion[J].Progress in Energy & Combustion Science,1999,25(1):55～116
[7]李树霞.城市污水污泥制生态水泥技术研究[D].贵州大学,2009
[8]王佳福,吕剑明.利用城市污泥制备陶粒的研究[J].硅酸盐通报,2012,31(3):706～710
[9]M.M.Jordán,Almendro-Candel M B,Romero M,et al.Application of sewage sludge in the manufacturing of ceramic tile bodies[J].Applied Clay Science,2005,30(3-4):0～224
[10]Wang X,Jin Y,Wang Z,et al.A research on sintering characteristics and mechanisms of dried sewage sludge[J].Journal of Hazardous Materials,2008,160(2-3):489～494
[11]Lin K L,Chiang K Y,Lin D F.Effect of heating temperature on the sintering characteristics of sewage sludge ash[J].Journal of Hazardous Materials,2006,128(2-3):175～181
[12]Xu G R,Zou J L,Li G B.Effect of sintering temperature on the characteristics of sludge ceramsite[J].Journal of Hazardous Materials,2008,150(2):394～400
[13]Wang L,Skjevrak G,Hustad J E,et al.Sintering characteristics of sewage sludge ashes at elevated temperatures[J].Fuel Processing Technology,2012,96(96):88～97
[14]张津践,钱晓倩,朱蓬莱,et al.利用污泥焚烧灰烧制硅酸盐水泥熟料研究[J].非金属矿,2015(6):73～75
[15]云璐,邢珂.粉煤灰的污染与应用[J].中华少年:研究青少年教育,2013(7):39～39
[16]秦玉珠,汪宁,魏丽丹,et al.对改性粉煤灰中硅铝铁溶出率的研究[J].长春师范学院学报:自然科学版,2014(2):90～93
[17]刘艳改,卫李贤,房明浩,et al.六铝酸钙/镁铝尖晶石复相材料的制备及性能[J].硅酸盐学报,2010,38(10)
[18]吕鹏,翟建平,李琴,et al.矿物掺合料火山灰活性的研究[J].建筑材料学报,2005,8(3):289～293
[19]Sheng S U,Peisheng L I,Xuexin S.THERMOGRAVIMETRIC STUDY ON BASIC CHARACTERISTICS OF SEWAGE SLUDGE AND IT’S MIXBURNING PERFORMANCE WITH COAL[J].Thermal Power Generation,2004
[20]N.Husillos Rodríguez,S.MartínezRamírez,Blancovarela M T,et al.Evaluation of spray-dried sludge from drinking water treatment plants as a prime material for clinker manufacture[J].Cement & Concrete Composites,2011,33(2):267～275